662916391 has 2 divisors, whose sum is σ = 662916392. Its totient is φ = 662916390.

The previous prime is 662916367. The next prime is 662916409. The reversal of 662916391 is 193619266.

662916391 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 662916391 - 2⁷ = 662916263 is a prime.

It is equal to p_34429939 and since 662916391 and 34429939 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (662916691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331458195 + 331458196.

It is an arithmetic number, because the mean of its divisors is an integer number (331458196).

Almost surely, 2^662916391 is an apocalyptic number.

662916391 is a deficient number, since it is larger than the sum of its proper divisors (1).

662916391 is an equidigital number, since it uses as much as digits as its factorization.

662916391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 104976, while the sum is 43.

The square root of 662916391 is about 25747.1627757312. The cubic root of 662916391 is about 871.9392996878.

The spelling of 662916391 in words is "six hundred sixty-two million, nine hundred sixteen thousand, three hundred ninety-one".