657065623 has 4 divisors (see below), whose sum is σ = 695716560. Its totient is φ = 618414688.

The previous prime is 657065621. The next prime is 657065639. The reversal of 657065623 is 326560756.

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

It is a cyclic number.

It is not a de Polignac number, because 657065623 - 2¹ = 657065621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (657065621) 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, 19325443 + ... + 19325476.

It is an arithmetic number, because the mean of its divisors is an integer number (173929140).

Almost surely, 2^657065623 is an apocalyptic number.

657065623 is a deficient number, since it is larger than the sum of its proper divisors (38650937).

657065623 is a wasteful number, since it uses less digits than its factorization.

657065623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38650936.

The product of its (nonzero) digits is 226800, while the sum is 40.

The square root of 657065623 is about 25633.2913025230. The cubic root of 657065623 is about 869.3665283379.

The spelling of 657065623 in words is "six hundred fifty-seven million, sixty-five thousand, six hundred twenty-three".