64516667 has 2 divisors, whose sum is σ = 64516668. Its totient is φ = 64516666.

The previous prime is 64516663. The next prime is 64516681. The reversal of 64516667 is 76661546.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64516667 - 2² = 64516663 is a prime.

It is not a weakly prime, because it can be changed into another prime (64516663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32258333 + 32258334.

It is an arithmetic number, because the mean of its divisors is an integer number (32258334).

Almost surely, 2^64516667 is an apocalyptic number.

64516667 is a deficient number, since it is larger than the sum of its proper divisors (1).

64516667 is an equidigital number, since it uses as much as digits as its factorization.

64516667 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 181440, while the sum is 41.

The square root of 64516667 is about 8032.2267771770. The cubic root of 64516667 is about 401.0735059683.

The spelling of 64516667 in words is "sixty-four million, five hundred sixteen thousand, six hundred sixty-seven".