66515247084 has 48 divisors (see below), whose sum is σ = 182335507200. Its totient is φ = 18605663040.

The previous prime is 66515247041. The next prime is 66515247121. The reversal of 66515247084 is 48074251566.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19379184 + ... + 19382615.

It is an arithmetic number, because the mean of its divisors is an integer number (3798656400).

Almost surely, 2^66515247084 is an apocalyptic number.

It is an amenable number.

66515247084 is an abundant number, since it is smaller than the sum of its proper divisors (115820260116).

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

66515247084 is a wasteful number, since it uses less digits than its factorization.

66515247084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38761830 (or 38761828 counting only the distinct ones).

The product of its (nonzero) digits is 1612800, while the sum is 48.

The spelling of 66515247084 in words is "sixty-six billion, five hundred fifteen million, two hundred forty-seven thousand, eighty-four".