66402426066 has 16 divisors (see below), whose sum is σ = 133684356288. Its totient is φ = 21987558000.

The previous prime is 66402426011. The next prime is 66402426107. The reversal of 66402426066 is 66062420466.

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, 36645025 + ... + 36646836.

It is an arithmetic number, because the mean of its divisors is an integer number (8355272268).

Almost surely, 2^66402426066 is an apocalyptic number.

66402426066 is an abundant number, since it is smaller than the sum of its proper divisors (67281930222).

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

66402426066 is a wasteful number, since it uses less digits than its factorization.

66402426066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73292017.

The product of its (nonzero) digits is 497664, while the sum is 42.

The spelling of 66402426066 in words is "sixty-six billion, four hundred two million, four hundred twenty-six thousand, sixty-six".