657677623 has 4 divisors (see below), whose sum is σ = 696364560. Its totient is φ = 618990688.

The previous prime is 657677611. The next prime is 657677651. The reversal of 657677623 is 326776756.

It is a happy number.

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 657677623 - 2⁵ = 657677591 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 (657677323) 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, 19343443 + ... + 19343476.

It is an arithmetic number, because the mean of its divisors is an integer number (174091140).

Almost surely, 2^657677623 is an apocalyptic number.

657677623 is a deficient number, since it is larger than the sum of its proper divisors (38686937).

657677623 is a wasteful number, since it uses less digits than its factorization.

657677623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38686936.

The product of its digits is 2222640, while the sum is 49.

The square root of 657677623 is about 25645.2261249535. The cubic root of 657677623 is about 869.6363579131.

The spelling of 657677623 in words is "six hundred fifty-seven million, six hundred seventy-seven thousand, six hundred twenty-three".