66700936560 has 160 divisors (see below), whose sum is σ = 216011888640. Its totient is φ = 16993951744.

The previous prime is 66700936459. The next prime is 66700936651. The reversal of 66700936560 is 6563900766.

It is a super-2 number, since 2×66700936560² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5121577 + ... + 5134583.

It is an arithmetic number, because the mean of its divisors is an integer number (1350074304).

Almost surely, 2^66700936560 is an apocalyptic number.

66700936560 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 66700936560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (108005944320).

66700936560 is an abundant number, since it is smaller than the sum of its proper divisors (149310952080).

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

66700936560 is a wasteful number, since it uses less digits than its factorization.

66700936560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13975 (or 13969 counting only the distinct ones).

The product of its (nonzero) digits is 1224720, while the sum is 48.

The spelling of 66700936560 in words is "sixty-six billion, seven hundred million, nine hundred thirty-six thousand, five hundred sixty".