64608720 has 80 divisors (see below), whose sum is σ = 218503872. Its totient is φ = 15662080.

The previous prime is 64608701. The next prime is 64608727. The reversal of 64608720 is 2780646.

64608720 = T₁₆₇₂ + T₁₆₇₃ + ... + T₁₇₁₆.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64608727) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9597 + ... + 14876.

Almost surely, 2^64608720 is an apocalyptic number.

64608720 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64608720 is an abundant number, since it is smaller than the sum of its proper divisors (153895152).

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

64608720 is a wasteful number, since it uses less digits than its factorization.

64608720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24500 (or 24494 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 33.

The square root of 64608720 is about 8037.9549637952. The cubic root of 64608720 is about 401.2641671612.

The spelling of 64608720 in words is "sixty-four million, six hundred eight thousand, seven hundred twenty".