66408424626 has 16 divisors (see below), whose sum is σ = 137101264128. Its totient is φ = 21422072400.

The previous prime is 66408424613. The next prime is 66408424637. The reversal of 66408424626 is 62642480466.

It is a super-2 number, since 2×66408424626² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 178517085 + ... + 178517456.

It is an arithmetic number, because the mean of its divisors is an integer number (8568829008).

Almost surely, 2^66408424626 is an apocalyptic number.

66408424626 is an abundant number, since it is smaller than the sum of its proper divisors (70692839502).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66408424626 is a wasteful number, since it uses less digits than its factorization.

66408424626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357034577.

The product of its (nonzero) digits is 2654208, while the sum is 48.

The spelling of 66408424626 in words is "sixty-six billion, four hundred eight million, four hundred twenty-four thousand, six hundred twenty-six".