66130371584 has 22 divisors (see below), whose sum is σ = 132196164774. Its totient is φ = 33065185280.

The previous prime is 66130371547. The next prime is 66130371623. The reversal of 66130371584 is 48517303166.

It can be written as a sum of positive squares in only one way, i.e., 66011997184 + 118374400 = 256928^2 + 10880^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32289197 + ... + 32291244.

Almost surely, 2^66130371584 is an apocalyptic number.

66130371584 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

66130371584 is a deficient number, since it is larger than the sum of its proper divisors (66065793190).

66130371584 is an equidigital number, since it uses as much as digits as its factorization.

66130371584 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64580461 (or 64580443 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 44.

The spelling of 66130371584 in words is "sixty-six billion, one hundred thirty million, three hundred seventy-one thousand, five hundred eighty-four".