64906657 has 2 divisors, whose sum is σ = 64906658. Its totient is φ = 64906656.

The previous prime is 64906643. The next prime is 64906661. The reversal of 64906657 is 75660946.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48455521 + 16451136 = 6961^2 + 4056^2 .

It is a cyclic number.

It is not a de Polignac number, because 64906657 - 2¹⁹ = 64382369 is a prime.

It is not a weakly prime, because it can be changed into another prime (64906687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32453328 + 32453329.

It is an arithmetic number, because the mean of its divisors is an integer number (32453329).

Almost surely, 2^64906657 is an apocalyptic number.

It is an amenable number.

64906657 is a deficient number, since it is larger than the sum of its proper divisors (1).

64906657 is an equidigital number, since it uses as much as digits as its factorization.

64906657 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 272160, while the sum is 43.

The square root of 64906657 is about 8056.4667814123. The cubic root of 64906657 is about 401.8800187305.

The spelling of 64906657 in words is "sixty-four million, nine hundred six thousand, six hundred fifty-seven".