66312879066 has 32 divisors (see below), whose sum is σ = 168413662080. Its totient is φ = 18946536768.

The previous prime is 66312879053. The next prime is 66312879091. The reversal of 66312879066 is 66097821366.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87715071 + ... + 87715826.

It is an arithmetic number, because the mean of its divisors is an integer number (5262926940).

Almost surely, 2^66312879066 is an apocalyptic number.

66312879066 is an abundant number, since it is smaller than the sum of its proper divisors (102100783014).

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

66312879066 is a wasteful number, since it uses less digits than its factorization.

66312879066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175430915 (or 175430909 counting only the distinct ones).

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

The spelling of 66312879066 in words is "sixty-six billion, three hundred twelve million, eight hundred seventy-nine thousand, sixty-six".