64698618 has 16 divisors (see below), whose sum is σ = 130070016. Its totient is φ = 21454080.

The previous prime is 64698577. The next prime is 64698653. The reversal of 64698618 is 81689646.

It is a super-2 number, since 2×64698618² = 8371822342219848, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 26778 + ... + 29093.

It is an arithmetic number, because the mean of its divisors is an integer number (8129376).

Almost surely, 2^64698618 is an apocalyptic number.

64698618 is an abundant number, since it is smaller than the sum of its proper divisors (65371398).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64698618 is a wasteful number, since it uses less digits than its factorization.

64698618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56069.

The product of its digits is 497664, while the sum is 48.

The square root of 64698618 is about 8043.5451139407. The cubic root of 64698618 is about 401.4501901839.

The spelling of 64698618 in words is "sixty-four million, six hundred ninety-eight thousand, six hundred eighteen".