66167517657 has 8 divisors (see below), whose sum is σ = 93412966176. Its totient is φ = 41516873792.

The previous prime is 66167517653. The next prime is 66167517667. The reversal of 66167517657 is 75671576166.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66167517657 - 2² = 66167517653 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66167517597 and 66167517606.

It is not an unprimeable number, because it can be changed into a prime (66167517653) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 648701103 + ... + 648701204.

It is an arithmetic number, because the mean of its divisors is an integer number (11676620772).

Almost surely, 2^66167517657 is an apocalyptic number.

It is an amenable number.

66167517657 is a deficient number, since it is larger than the sum of its proper divisors (27245448519).

66167517657 is a wasteful number, since it uses less digits than its factorization.

66167517657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1297402327.

The product of its digits is 11113200, while the sum is 57.

The spelling of 66167517657 in words is "sixty-six billion, one hundred sixty-seven million, five hundred seventeen thousand, six hundred fifty-seven".