665042373 has 8 divisors (see below), whose sum is σ = 985248000. Its totient is φ = 443361564.

The previous prime is 665042369. The next prime is 665042377. The reversal of 665042373 is 373240566.

665042373 is a `hidden beast` number, since 66 + 504 + 23 + 73 = 666.

It is an interprime number because it is at equal distance from previous prime (665042369) and next prime (665042377).

It is not a de Polignac number, because 665042373 - 2² = 665042369 is a prime.

It is a super-2 number, since 2×665042373² = 884562715770942258, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665042377) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12315573 + ... + 12315626.

It is an arithmetic number, because the mean of its divisors is an integer number (123156000).

Almost surely, 2^665042373 is an apocalyptic number.

It is an amenable number.

665042373 is a deficient number, since it is larger than the sum of its proper divisors (320205627).

665042373 is a wasteful number, since it uses less digits than its factorization.

665042373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24631208 (or 24631202 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 36.

The square root of 665042373 is about 25788.4154805990. The cubic root of 665042373 is about 872.8704121486.

The spelling of 665042373 in words is "six hundred sixty-five million, forty-two thousand, three hundred seventy-three".