66376320 has 128 divisors (see below), whose sum is σ = 213857280. Its totient is φ = 17510400.

The previous prime is 66376319. The next prime is 66376333. The reversal of 66376320 is 2367366.

It is a tau number, because it is divible by the number of its divisors (128).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 347425 + ... + 347615.

It is an arithmetic number, because the mean of its divisors is an integer number (1670760).

Almost surely, 2^66376320 is an apocalyptic number.

66376320 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 66376320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106928640).

66376320 is an abundant number, since it is smaller than the sum of its proper divisors (147480960).

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

66376320 is a wasteful number, since it uses less digits than its factorization.

66376320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394 (or 382 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 33.

The square root of 66376320 is about 8147.1663785638. The cubic root of 66376320 is about 404.8906273780.

The spelling of 66376320 in words is "sixty-six million, three hundred seventy-six thousand, three hundred twenty".