64918680 has 32 divisors (see below), whose sum is σ = 194756400. Its totient is φ = 17311616.

The previous prime is 64918663. The next prime is 64918697. The reversal of 64918680 is 8681946.

It is an interprime number because it is at equal distance from previous prime (64918663) and next prime (64918697).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 270375 + ... + 270614.

Almost surely, 2^64918680 is an apocalyptic number.

64918680 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64918680 is an abundant number, since it is smaller than the sum of its proper divisors (129837720).

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

64918680 is a wasteful number, since it uses less digits than its factorization.

64918680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 541003 (or 540999 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 42.

The square root of 64918680 is about 8057.2129176285. The cubic root of 64918680 is about 401.9048313120.

The spelling of 64918680 in words is "sixty-four million, nine hundred eighteen thousand, six hundred eighty".