65887457 has 2 divisors, whose sum is σ = 65887458. Its totient is φ = 65887456.

The previous prime is 65887453. The next prime is 65887463. The reversal of 65887457 is 75478856.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50708641 + 15178816 = 7121^2 + 3896^2 .

It is a cyclic number.

It is not a de Polignac number, because 65887457 - 2² = 65887453 is a prime.

It is not a weakly prime, because it can be changed into another prime (65887453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32943728 + 32943729.

It is an arithmetic number, because the mean of its divisors is an integer number (32943729).

Almost surely, 2^65887457 is an apocalyptic number.

It is an amenable number.

65887457 is a deficient number, since it is larger than the sum of its proper divisors (1).

65887457 is an equidigital number, since it uses as much as digits as its factorization.

65887457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1881600, while the sum is 50.

The square root of 65887457 is about 8117.1089065011. The cubic root of 65887457 is about 403.8941677005.

The spelling of 65887457 in words is "sixty-five million, eight hundred eighty-seven thousand, four hundred fifty-seven".