64916880 has 160 divisors (see below), whose sum is σ = 243627264. Its totient is φ = 13959168.

The previous prime is 64916851. The next prime is 64916881. The reversal of 64916880 is 8861946.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (64916881) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27424 + ... + 29696.

Almost surely, 2^64916880 is an apocalyptic number.

64916880 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64916880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (121813632).

64916880 is an abundant number, since it is smaller than the sum of its proper divisors (178710384).

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

64916880 is a wasteful number, since it uses less digits than its factorization.

64916880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2313 (or 2307 counting only the distinct ones).

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

The square root of 64916880 is about 8057.1012156979. The cubic root of 64916880 is about 401.9011167397.

The spelling of 64916880 in words is "sixty-four million, nine hundred sixteen thousand, eight hundred eighty".