716661457 has 2 divisors, whose sum is σ = 716661458. Its totient is φ = 716661456.

The previous prime is 716661431. The next prime is 716661493. The reversal of 716661457 is 754166617.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 455224896 + 261436561 = 21336^2 + 16169^2 .

It is a cyclic number.

It is not a de Polignac number, because 716661457 - 2⁷ = 716661329 is a prime.

It is not a weakly prime, because it can be changed into another prime (716611457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 358330728 + 358330729.

It is an arithmetic number, because the mean of its divisors is an integer number (358330729).

Almost surely, 2^716661457 is an apocalyptic number.

It is an amenable number.

716661457 is a deficient number, since it is larger than the sum of its proper divisors (1).

716661457 is an equidigital number, since it uses as much as digits as its factorization.

716661457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 211680, while the sum is 43.

The square root of 716661457 is about 26770.5333716009. The cubic root of 716661457 is about 894.8934912736.

The spelling of 716661457 in words is "seven hundred sixteen million, six hundred sixty-one thousand, four hundred fifty-seven".