656677451 has 2 divisors, whose sum is σ = 656677452. Its totient is φ = 656677450.

The previous prime is 656677447. The next prime is 656677459. The reversal of 656677451 is 154776656.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 656677451 - 2² = 656677447 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 656677396 and 656677405.

It is not a weakly prime, because it can be changed into another prime (656677459) 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 as a sum of consecutive naturals, namely, 328338725 + 328338726.

It is an arithmetic number, because the mean of its divisors is an integer number (328338726).

Almost surely, 2^656677451 is an apocalyptic number.

656677451 is a deficient number, since it is larger than the sum of its proper divisors (1).

656677451 is an equidigital number, since it uses as much as digits as its factorization.

656677451 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1058400, while the sum is 47.

The square root of 656677451 is about 25625.7185460233. The cubic root of 656677451 is about 869.1952972320.

The spelling of 656677451 in words is "six hundred fifty-six million, six hundred seventy-seven thousand, four hundred fifty-one".