66062866680 has 128 divisors (see below), whose sum is σ = 220552243200. Its totient is φ = 17589350016.

The previous prime is 66062866679. The next prime is 66062866687. The reversal of 66062866680 is 8666826066.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66062866687) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 651489 + ... + 746031.

It is an arithmetic number, because the mean of its divisors is an integer number (1723064400).

Almost surely, 2^66062866680 is an apocalyptic number.

66062866680 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 66062866680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (110276121600).

66062866680 is an abundant number, since it is smaller than the sum of its proper divisors (154489376520).

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

66062866680 is a wasteful number, since it uses less digits than its factorization.

66062866680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95210 (or 95200 counting only the distinct ones).

The product of its (nonzero) digits is 5971968, while the sum is 54.

The spelling of 66062866680 in words is "sixty-six billion, sixty-two million, eight hundred sixty-six thousand, six hundred eighty".