64418677 has 2 divisors, whose sum is σ = 64418678. Its totient is φ = 64418676.

The previous prime is 64418671. The next prime is 64418681. The reversal of 64418677 is 77681446.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64224196 + 194481 = 8014^2 + 441^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64418677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64418671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32209338 + 32209339.

It is an arithmetic number, because the mean of its divisors is an integer number (32209339).

Almost surely, 2^64418677 is an apocalyptic number.

It is an amenable number.

64418677 is a deficient number, since it is larger than the sum of its proper divisors (1).

64418677 is an equidigital number, since it uses as much as digits as its factorization.

64418677 is an evil number, because the sum of its binary digits is even.

The product of its digits is 225792, while the sum is 43.

The square root of 64418677 is about 8026.1246563955. The cubic root of 64418677 is about 400.8703486097.

It can be divided in two parts, 644 and 18677, that added together give a square (19321 = 139²).

The spelling of 64418677 in words is "sixty-four million, four hundred eighteen thousand, six hundred seventy-seven".