66500156650 has 96 divisors (see below), whose sum is σ = 132477949440. Its totient is φ = 24790187520.

The previous prime is 66500156551. The next prime is 66500156669. The reversal of 66500156650 is 5665100566.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4968267 + ... + 4981633.

It is an arithmetic number, because the mean of its divisors is an integer number (1379978640).

Almost surely, 2^66500156650 is an apocalyptic number.

66500156650 is a deficient number, since it is larger than the sum of its proper divisors (65977792790).

66500156650 is a wasteful number, since it uses less digits than its factorization.

66500156650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13528 (or 13523 counting only the distinct ones).

The product of its (nonzero) digits is 162000, while the sum is 40.

The spelling of 66500156650 in words is "sixty-six billion, five hundred million, one hundred fifty-six thousand, six hundred fifty".