66037894857 has 24 divisors (see below), whose sum is σ = 104073254688. Its totient is φ = 40017758400.

The previous prime is 66037894841. The next prime is 66037894903. The reversal of 66037894857 is 75849873066.

It is not a de Polignac number, because 66037894857 - 2⁴ = 66037894841 is a prime.

It is a super-2 number, since 2×66037894857² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 66037894794 and 66037894803.

It is not an unprimeable number, because it can be changed into a prime (66037894457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 804438 + ... + 882720.

It is an arithmetic number, because the mean of its divisors is an integer number (4336385612).

Almost surely, 2^66037894857 is an apocalyptic number.

It is an amenable number.

66037894857 is a deficient number, since it is larger than the sum of its proper divisors (38035359831).

66037894857 is a wasteful number, since it uses less digits than its factorization.

66037894857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86821 (or 86818 counting only the distinct ones).

The product of its (nonzero) digits is 60963840, while the sum is 63.

The spelling of 66037894857 in words is "sixty-six billion, thirty-seven million, eight hundred ninety-four thousand, eight hundred fifty-seven".