665167373 has 4 divisors (see below), whose sum is σ = 716334108. Its totient is φ = 614000640.

The previous prime is 665167367. The next prime is 665167379. The reversal of 665167373 is 373761566.

665167373 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 373761566 = 2 ⋅186880783.

It is an interprime number because it is at equal distance from previous prime (665167367) and next prime (665167379).

It can be written as a sum of positive squares in 2 ways, for example, as 77492809 + 587674564 = 8803^2 + 24242^2 .

It is a cyclic number.

It is not a de Polignac number, because 665167373 - 2⁶ = 665167309 is a prime.

It is a super-2 number, since 2×665167373² = 884895268207442258, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665167379) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25583348 + ... + 25583373.

It is an arithmetic number, because the mean of its divisors is an integer number (179083527).

Almost surely, 2^665167373 is an apocalyptic number.

It is an amenable number.

665167373 is a deficient number, since it is larger than the sum of its proper divisors (51166735).

665167373 is a wasteful number, since it uses less digits than its factorization.

665167373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51166734.

The product of its digits is 476280, while the sum is 44.

The square root of 665167373 is about 25790.8389355600. The cubic root of 665167373 is about 872.9250963666.

The spelling of 665167373 in words is "six hundred sixty-five million, one hundred sixty-seven thousand, three hundred seventy-three".