65770387 has 2 divisors, whose sum is σ = 65770388. Its totient is φ = 65770386.

The previous prime is 65770357. The next prime is 65770391. The reversal of 65770387 is 78307756.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 65770387 - 2⁷ = 65770259 is a prime.

It is a super-2 number, since 2×65770387² = 8651487612259538, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (65770357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32885193 + 32885194.

It is an arithmetic number, because the mean of its divisors is an integer number (32885194).

Almost surely, 2^65770387 is an apocalyptic number.

65770387 is a deficient number, since it is larger than the sum of its proper divisors (1).

65770387 is an equidigital number, since it uses as much as digits as its factorization.

65770387 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 246960, while the sum is 43.

The square root of 65770387 is about 8109.8943889548. The cubic root of 65770387 is about 403.6548104440.

The spelling of 65770387 in words is "sixty-five million, seven hundred seventy thousand, three hundred eighty-seven".