66106510516 has 12 divisors (see below), whose sum is σ = 116196026688. Its totient is φ = 32907645752.

The previous prime is 66106510493. The next prime is 66106510531. The reversal of 66106510516 is 61501560166.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36401356 + ... + 36403171.

It is an arithmetic number, because the mean of its divisors is an integer number (9683002224).

Almost surely, 2^66106510516 is an apocalyptic number.

It is an amenable number.

66106510516 is a deficient number, since it is larger than the sum of its proper divisors (50089516172).

66106510516 is a wasteful number, since it uses less digits than its factorization.

66106510516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72804758 (or 72804756 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 37.

The spelling of 66106510516 in words is "sixty-six billion, one hundred six million, five hundred ten thousand, five hundred sixteen".