64664607031 has 2 divisors, whose sum is σ = 64664607032. Its totient is φ = 64664607030.

The previous prime is 64664607013. The next prime is 64664607061. The reversal of 64664607031 is 13070646646.

Together with previous prime (64664607013) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64664607031 - 2¹⁵ = 64664574263 is a prime.

It is a super-2 number, since 2×64664607031² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64664607061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32332303515 + 32332303516.

It is an arithmetic number, because the mean of its divisors is an integer number (32332303516).

Almost surely, 2^64664607031 is an apocalyptic number.

64664607031 is a deficient number, since it is larger than the sum of its proper divisors (1).

64664607031 is an equidigital number, since it uses as much as digits as its factorization.

64664607031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 435456, while the sum is 43.

The spelling of 64664607031 in words is "sixty-four billion, six hundred sixty-four million, six hundred seven thousand, thirty-one".