66612130580 has 24 divisors (see below), whose sum is σ = 144709112520. Its totient is φ = 25726064000.

The previous prime is 66612130567. The next prime is 66612130583. The reversal of 66612130580 is 8503121666.

It can be written as a sum of positive squares in 4 ways, for example, as 3252192784 + 63359937796 = 57028^2 + 251714^2 .

It is a super-3 number, since 3×66612130580³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66612130583) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57423671 + ... + 57424830.

It is an arithmetic number, because the mean of its divisors is an integer number (6029546355).

Almost surely, 2^66612130580 is an apocalyptic number.

It is an amenable number.

66612130580 is an abundant number, since it is smaller than the sum of its proper divisors (78096981940).

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

66612130580 is a wasteful number, since it uses less digits than its factorization.

66612130580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114848539 (or 114848537 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 38.

The spelling of 66612130580 in words is "sixty-six billion, six hundred twelve million, one hundred thirty thousand, five hundred eighty".