656451663 has 8 divisors (see below), whose sum is σ = 1000307328. Its totient is φ = 375115224.

The previous prime is 656451643. The next prime is 656451703. The reversal of 656451663 is 366154656.

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

It is not a de Polignac number, because 656451663 - 2⁶ = 656451599 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656451623) 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, 15629781 + ... + 15629822.

It is an arithmetic number, because the mean of its divisors is an integer number (125038416).

Almost surely, 2^656451663 is an apocalyptic number.

656451663 is a deficient number, since it is larger than the sum of its proper divisors (343855665).

656451663 is a wasteful number, since it uses less digits than its factorization.

656451663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31259613.

The product of its digits is 388800, while the sum is 42.

The square root of 656451663 is about 25621.3126712899. The cubic root of 656451663 is about 869.0956661956.

The spelling of 656451663 in words is "six hundred fifty-six million, four hundred fifty-one thousand, six hundred sixty-three".