66340817412 has 24 divisors (see below), whose sum is σ = 154802272800. Its totient is φ = 22112601216.

The previous prime is 66340817369. The next prime is 66340817443. The reversal of 66340817412 is 21471804366.

It is a super-2 number, since 2×66340817412² (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, 179164 + ... + 405932.

It is an arithmetic number, because the mean of its divisors is an integer number (6450094700).

Almost surely, 2^66340817412 is an apocalyptic number.

It is an amenable number.

66340817412 is an abundant number, since it is smaller than the sum of its proper divisors (88461455388).

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

66340817412 is a wasteful number, since it uses less digits than its factorization.

66340817412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251155 (or 251153 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 42.

The spelling of 66340817412 in words is "sixty-six billion, three hundred forty million, eight hundred seventeen thousand, four hundred twelve".