656521106 has 4 divisors (see below), whose sum is σ = 984781662. Its totient is φ = 328260552.

The previous prime is 656521097. The next prime is 656521121. The reversal of 656521106 is 601125656.

656521106 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in only one way, i.e., 438693025 + 217828081 = 20945^2 + 14759^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 164130275 + ... + 164130278.

Almost surely, 2^656521106 is an apocalyptic number.

656521106 is a deficient number, since it is larger than the sum of its proper divisors (328260556).

656521106 is a wasteful number, since it uses less digits than its factorization.

656521106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328260555.

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 656521106 is about 25622.6678158228. The cubic root of 656521106 is about 869.1263109918.

The spelling of 656521106 in words is "six hundred fifty-six million, five hundred twenty-one thousand, one hundred six".