66870360 has 80 divisors (see below), whose sum is σ = 224769600. Its totient is φ = 17831232.

The previous prime is 66870343. The next prime is 66870371. The reversal of 66870360 is 6307866.

It is a happy number.

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

It is a zygodrome in base 3.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 7080 + ... + 13559.

It is an arithmetic number, because the mean of its divisors is an integer number (2809620).

Almost surely, 2^66870360 is an apocalyptic number.

66870360 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66870360 is an abundant number, since it is smaller than the sum of its proper divisors (157899240).

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

66870360 is a wasteful number, since it uses less digits than its factorization.

66870360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20662 (or 20649 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 66870360 is about 8177.4299140989. The cubic root of 66870360 is about 405.8926811561.

The spelling of 66870360 in words is "sixty-six million, eight hundred seventy thousand, three hundred sixty".