66860760 has 64 divisors (see below), whose sum is σ = 201127680. Its totient is φ = 17781120.

The previous prime is 66860741. The next prime is 66860767. The reversal of 66860760 is 6706866.

It is a super-2 number, since 2×66860760² = 8940722455555200, which contains 22 as substring.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66860767) 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, 75279 + ... + 76161.

It is an arithmetic number, because the mean of its divisors is an integer number (3142620).

Almost surely, 2^66860760 is an apocalyptic number.

66860760 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66860760 is an abundant number, since it is smaller than the sum of its proper divisors (134266920).

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

66860760 is a wasteful number, since it uses less digits than its factorization.

66860760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1528 (or 1524 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 39.

The square root of 66860760 is about 8176.8429115399. The cubic root of 66860760 is about 405.8732567244.

The spelling of 66860760 in words is "sixty-six million, eight hundred sixty thousand, seven hundred sixty".