66145086516 has 24 divisors (see below), whose sum is σ = 154342722240. Its totient is φ = 22047764032.

The previous prime is 66145086509. The next prime is 66145086559. The reversal of 66145086516 is 61568054166.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 749320 + ... + 832928.

It is an arithmetic number, because the mean of its divisors is an integer number (6430946760).

Almost surely, 2^66145086516 is an apocalyptic number.

It is an amenable number.

66145086516 is an abundant number, since it is smaller than the sum of its proper divisors (88197635724).

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

66145086516 is a wasteful number, since it uses less digits than its factorization.

66145086516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149543 (or 149541 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 48.

The spelling of 66145086516 in words is "sixty-six billion, one hundred forty-five million, eighty-six thousand, five hundred sixteen".