66513672575 has 48 divisors (see below), whose sum is σ = 101440453824. Its totient is φ = 42222643200.

The previous prime is 66513672569. The next prime is 66513672611. The reversal of 66513672575 is 57527631566.

It is not a de Polignac number, because 66513672575 - 2⁴ = 66513672559 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 1784 + ... + 364733.

It is an arithmetic number, because the mean of its divisors is an integer number (2113342788).

Almost surely, 2^66513672575 is an apocalyptic number.

66513672575 is a deficient number, since it is larger than the sum of its proper divisors (34926781249).

66513672575 is a wasteful number, since it uses less digits than its factorization.

66513672575 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366612 (or 366607 counting only the distinct ones).

The product of its digits is 7938000, while the sum is 53.

The spelling of 66513672575 in words is "sixty-six billion, five hundred thirteen million, six hundred seventy-two thousand, five hundred seventy-five".