66572690431 has 8 divisors (see below), whose sum is σ = 71718403680. Its totient is φ = 61430511072.

The previous prime is 66572690419. The next prime is 66572690453. The reversal of 66572690431 is 13409627566.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66572690431 - 2⁹ = 66572689919 is a prime.

It is a super-2 number, since 2×66572690431² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66572690491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 844276 + ... + 919753.

It is an arithmetic number, because the mean of its divisors is an integer number (8964800460).

Almost surely, 2^66572690431 is an apocalyptic number.

66572690431 is a deficient number, since it is larger than the sum of its proper divisors (5145713249).

66572690431 is a wasteful number, since it uses less digits than its factorization.

66572690431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1766945.

The product of its (nonzero) digits is 1632960, while the sum is 49.

The spelling of 66572690431 in words is "sixty-six billion, five hundred seventy-two million, six hundred ninety thousand, four hundred thirty-one".