657055623 has 8 divisors (see below), whose sum is σ = 1001227648. Its totient is φ = 375460344.

The previous prime is 657055603. The next prime is 657055631. The reversal of 657055623 is 326550756.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 657055623 - 2⁵ = 657055591 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 (657055603) 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, 15644161 + ... + 15644202.

It is an arithmetic number, because the mean of its divisors is an integer number (125153456).

Almost surely, 2^657055623 is an apocalyptic number.

657055623 is a deficient number, since it is larger than the sum of its proper divisors (344172025).

657055623 is a wasteful number, since it uses less digits than its factorization.

657055623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31288373.

The product of its (nonzero) digits is 189000, while the sum is 39.

The square root of 657055623 is about 25633.0962429434. The cubic root of 657055623 is about 869.3621179669.

The spelling of 657055623 in words is "six hundred fifty-seven million, fifty-five thousand, six hundred twenty-three".