64617677 has 2 divisors, whose sum is σ = 64617678. Its totient is φ = 64617676.

The previous prime is 64617661. The next prime is 64617701. The reversal of 64617677 is 77671646.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57547396 + 7070281 = 7586^2 + 2659^2 .

It is a cyclic number.

It is not a de Polignac number, because 64617677 - 2⁴ = 64617661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64617607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32308838 + 32308839.

It is an arithmetic number, because the mean of its divisors is an integer number (32308839).

Almost surely, 2^64617677 is an apocalyptic number.

It is an amenable number.

64617677 is a deficient number, since it is larger than the sum of its proper divisors (1).

64617677 is an equidigital number, since it uses as much as digits as its factorization.

64617677 is an evil number, because the sum of its binary digits is even.

The product of its digits is 296352, while the sum is 44.

The square root of 64617677 is about 8038.5121135693. The cubic root of 64617677 is about 401.2827093284.

The spelling of 64617677 in words is "sixty-four million, six hundred seventeen thousand, six hundred seventy-seven".