66572690169 has 16 divisors (see below), whose sum is σ = 89142768000. Its totient is φ = 44192591616.

The previous prime is 66572690137. The next prime is 66572690207. The reversal of 66572690169 is 96109627566.

It is not a de Polignac number, because 66572690169 - 2⁵ = 66572690137 is a prime.

It is a super-2 number, since 2×66572690169² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66572690269) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 643932 + ... + 740130.

It is an arithmetic number, because the mean of its divisors is an integer number (5571423000).

Almost surely, 2^66572690169 is an apocalyptic number.

It is an amenable number.

66572690169 is a deficient number, since it is larger than the sum of its proper divisors (22570077831).

66572690169 is a wasteful number, since it uses less digits than its factorization.

66572690169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97184.

The product of its (nonzero) digits is 7348320, while the sum is 57.

The spelling of 66572690169 in words is "sixty-six billion, five hundred seventy-two million, six hundred ninety thousand, one hundred sixty-nine".