656623102 has 4 divisors (see below), whose sum is σ = 984934656. Its totient is φ = 328311550.

The previous prime is 656623091. The next prime is 656623117. The reversal of 656623102 is 201326656.

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

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 164155774 + ... + 164155777.

It is an arithmetic number, because the mean of its divisors is an integer number (246233664).

Almost surely, 2^656623102 is an apocalyptic number.

656623102 is a deficient number, since it is larger than the sum of its proper divisors (328311554).

656623102 is a wasteful number, since it uses less digits than its factorization.

656623102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328311553.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 656623102 is about 25624.6580855238. The cubic root of 656623102 is about 869.1713173220.

Adding to 656623102 its reverse (201326656), we get a palindrome (857949758).

The spelling of 656623102 in words is "six hundred fifty-six million, six hundred twenty-three thousand, one hundred two".