42662996721 has 12 divisors (see below), whose sum is σ = 61752986880. Its totient is φ = 28382617080.

The previous prime is 42662996711. The next prime is 42662996737. The reversal of 42662996721 is 12769926624.

42662996721 is a `hidden beast` number, since 4 + 2 + 6 + 629 + 9 + 6 + 7 + 2 + 1 = 666.

It is not a de Polignac number, because 42662996721 - 2⁵ = 42662996689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42662996711) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4943845 + ... + 4952466.

It is an arithmetic number, because the mean of its divisors is an integer number (5146082240).

Almost surely, 2^42662996721 is an apocalyptic number.

It is an amenable number.

42662996721 is a deficient number, since it is larger than the sum of its proper divisors (19089990159).

42662996721 is a wasteful number, since it uses less digits than its factorization.

42662996721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9896796 (or 9896793 counting only the distinct ones).

The product of its digits is 3919104, while the sum is 54.

The spelling of 42662996721 in words is "forty-two billion, six hundred sixty-two million, nine hundred ninety-six thousand, seven hundred twenty-one".