66901376 has 64 divisors (see below), whose sum is σ = 140454000. Its totient is φ = 31696896.

The previous prime is 66901363. The next prime is 66901391. The reversal of 66901376 is 67310966.

66901376 = 474² + 475² + ... + 674².

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×66901376² = 8951588221386752, which contains 22 as substring.

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, 248570 + ... + 248838.

Almost surely, 2^66901376 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66901376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70227000).

66901376 is an abundant number, since it is smaller than the sum of its proper divisors (73552624).

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

66901376 is a wasteful number, since it uses less digits than its factorization.

66901376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379 (or 367 counting only the distinct ones).

The product of its (nonzero) digits is 40824, while the sum is 38.

The square root of 66901376 is about 8179.3261336127. The cubic root of 66901376 is about 405.9554255544.

The spelling of 66901376 in words is "sixty-six million, nine hundred one thousand, three hundred seventy-six".