64660663 has 2 divisors, whose sum is σ = 64660664. Its totient is φ = 64660662.

The previous prime is 64660657. The next prime is 64660681. The reversal of 64660663 is 36606646.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64660663 - 2⁹ = 64660151 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64660643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32330331 + 32330332.

It is an arithmetic number, because the mean of its divisors is an integer number (32330332).

Almost surely, 2^64660663 is an apocalyptic number.

64660663 is a deficient number, since it is larger than the sum of its proper divisors (1).

64660663 is an equidigital number, since it uses as much as digits as its factorization.

64660663 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 93312, while the sum is 37.

The square root of 64660663 is about 8041.1854225605. The cubic root of 64660663 is about 401.3716721621.

The spelling of 64660663 in words is "sixty-four million, six hundred sixty thousand, six hundred sixty-three".