66938358572 has 12 divisors (see below), whose sum is σ = 119999252856. Its totient is φ = 32652857760.

The previous prime is 66938358533. The next prime is 66938358611. The reversal of 66938358572 is 27585383966.

It is an interprime number because it is at equal distance from previous prime (66938358533) and next prime (66938358611).

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, 204080198 + ... + 204080525.

It is an arithmetic number, because the mean of its divisors is an integer number (9999937738).

Almost surely, 2^66938358572 is an apocalyptic number.

It is an amenable number.

66938358572 is a deficient number, since it is larger than the sum of its proper divisors (53060894284).

66938358572 is a wasteful number, since it uses less digits than its factorization.

66938358572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408160768 (or 408160766 counting only the distinct ones).

The product of its digits is 65318400, while the sum is 62.

The spelling of 66938358572 in words is "sixty-six billion, nine hundred thirty-eight million, three hundred fifty-eight thousand, five hundred seventy-two".