66916080 has 480 divisors, whose sum is σ = 300837888. Its totient is φ = 12902400.

The previous prime is 66916067. The next prime is 66916099. The reversal of 66916080 is 8061966.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 942445 + ... + 942515.

Almost surely, 2^66916080 is an apocalyptic number.

66916080 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 66916080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (150418944).

66916080 is an abundant number, since it is smaller than the sum of its proper divisors (233921808).

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

66916080 is a wasteful number, since it uses less digits than its factorization.

66916080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125 (or 116 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 66916080 is about 8180.2249357826. The cubic root of 66916080 is about 405.9851645109.

The spelling of 66916080 in words is "sixty-six million, nine hundred sixteen thousand, eighty".