66112722820731 has 8 divisors (see below), whose sum is σ = 91982918707200. Its totient is φ = 42158837740712.

The previous prime is 66112722820681. The next prime is 66112722820747. The reversal of 66112722820731 is 13702822721166.

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 66112722820731 - 2⁶ = 66112722820667 is a prime.

It is a super-2 number, since 2×66112722820731² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66112722820751) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 479077701531 + ... + 479077701668.

It is an arithmetic number, because the mean of its divisors is an integer number (11497864838400).

Almost surely, 2^{66112722820731} is an apocalyptic number.

66112722820731 is a deficient number, since it is larger than the sum of its proper divisors (25870195886469).

66112722820731 is a wasteful number, since it uses less digits than its factorization.

66112722820731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 958155403225.

The product of its (nonzero) digits is 677376, while the sum is 48.

The spelling of 66112722820731 in words is "sixty-six trillion, one hundred twelve billion, seven hundred twenty-two million, eight hundred twenty thousand, seven hundred thirty-one".