667701073 has 4 divisors (see below), whose sum is σ = 719062708. Its totient is φ = 616339440.

The previous prime is 667701043. The next prime is 667701091. The reversal of 667701073 is 370107766.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 419102784 + 248598289 = 20472^2 + 15767^2 .

It is a cyclic number.

It is not a de Polignac number, because 667701073 - 2²¹ = 665603921 is a prime.

It is not an unprimeable number, because it can be changed into a prime (667701043) 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, 25680798 + ... + 25680823.

It is an arithmetic number, because the mean of its divisors is an integer number (179765677).

Almost surely, 2^667701073 is an apocalyptic number.

It is an amenable number.

667701073 is a deficient number, since it is larger than the sum of its proper divisors (51361635).

667701073 is a wasteful number, since it uses less digits than its factorization.

667701073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51361634.

The product of its (nonzero) digits is 37044, while the sum is 37.

The square root of 667701073 is about 25839.9124031023. The cubic root of 667701073 is about 874.0320498382.

The spelling of 667701073 in words is "six hundred sixty-seven million, seven hundred one thousand, seventy-three".