656630051 has 8 divisors (see below), whose sum is σ = 818655744. Its totient is φ = 511659720.

The previous prime is 656630021. The next prime is 656630077. The reversal of 656630051 is 150036656.

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

It is not a de Polignac number, because 656630051 - 2¹⁰ = 656629027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (656630021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4263755 + ... + 4263908.

It is an arithmetic number, because the mean of its divisors is an integer number (102331968).

Almost surely, 2^656630051 is an apocalyptic number.

656630051 is a deficient number, since it is larger than the sum of its proper divisors (162025693).

656630051 is a wasteful number, since it uses less digits than its factorization.

656630051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8527681.

The product of its (nonzero) digits is 16200, while the sum is 32.

The square root of 656630051 is about 25624.7936772182. The cubic root of 656630051 is about 869.1743834392.

The spelling of 656630051 in words is "six hundred fifty-six million, six hundred thirty thousand, fifty-one".