66154329868 has 24 divisors (see below), whose sum is σ = 126955874304. Its totient is φ = 29912710800.

The previous prime is 66154329797. The next prime is 66154329883. The reversal of 66154329868 is 86892345166.

It is a hoax number, since the sum of its digits (58) coincides with the sum of the digits of its distinct prime factors.

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, 3927480 + ... + 3944287.

It is an arithmetic number, because the mean of its divisors is an integer number (5289828096).

Almost surely, 2^66154329868 is an apocalyptic number.

It is an amenable number.

66154329868 is a deficient number, since it is larger than the sum of its proper divisors (60801544436).

66154329868 is a wasteful number, since it uses less digits than its factorization.

66154329868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7871973 (or 7871971 counting only the distinct ones).

The product of its digits is 14929920, while the sum is 58.

The spelling of 66154329868 in words is "sixty-six billion, one hundred fifty-four million, three hundred twenty-nine thousand, eight hundred sixty-eight".