64818667 has 2 divisors, whose sum is σ = 64818668. Its totient is φ = 64818666.

The previous prime is 64818659. The next prime is 64818697. The reversal of 64818667 is 76681846.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64818667 - 2³ = 64818659 is a prime.

It is not a weakly prime, because it can be changed into another prime (64818697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32409333 + 32409334.

It is an arithmetic number, because the mean of its divisors is an integer number (32409334).

Almost surely, 2^64818667 is an apocalyptic number.

64818667 is a deficient number, since it is larger than the sum of its proper divisors (1).

64818667 is an equidigital number, since it uses as much as digits as its factorization.

64818667 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 387072, while the sum is 46.

The square root of 64818667 is about 8051.0040988687. The cubic root of 64818667 is about 401.6983351886.

The spelling of 64818667 in words is "sixty-four million, eight hundred eighteen thousand, six hundred sixty-seven".