66701805394617 has 24 divisors (see below), whose sum is σ = 99178026851904. Its totient is φ = 43173651465504.

The previous prime is 66701805394613. The next prime is 66701805394657. The reversal of 66701805394617 is 71649350810766.

66701805394617 is a `hidden beast` number, since 6 + 6 + 7 + 0 + 1 + 8 + 0 + 5 + 3 + 9 + 4 + 617 = 666.

It is not a de Polignac number, because 66701805394617 - 2² = 66701805394613 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66701805394613) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 515971558 + ... + 516100815.

It is an arithmetic number, because the mean of its divisors is an integer number (4132417785496).

Almost surely, 2^{66701805394617} is an apocalyptic number.

It is an amenable number.

66701805394617 is a deficient number, since it is larger than the sum of its proper divisors (32476221457287).

66701805394617 is a wasteful number, since it uses less digits than its factorization.

66701805394617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1032072589 (or 1032072586 counting only the distinct ones).

The product of its (nonzero) digits is 45722880, while the sum is 63.

The spelling of 66701805394617 in words is "sixty-six trillion, seven hundred one billion, eight hundred five million, three hundred ninety-four thousand, six hundred seventeen".