66717038446 has 32 divisors (see below), whose sum is σ = 105877416960. Its totient is φ = 31465852704.

The previous prime is 66717038429. The next prime is 66717038447. The reversal of 66717038446 is 64483071766.

It is a Smith number, since the sum of its digits (52) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 66717038393 and 66717038402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66717038447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3089041 + ... + 3110563.

It is an arithmetic number, because the mean of its divisors is an integer number (3308669280).

Almost surely, 2^66717038446 is an apocalyptic number.

66717038446 is a deficient number, since it is larger than the sum of its proper divisors (39160378514).

66717038446 is a wasteful number, since it uses less digits than its factorization.

66717038446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22480.

The product of its (nonzero) digits is 4064256, while the sum is 52.

The spelling of 66717038446 in words is "sixty-six billion, seven hundred seventeen million, thirty-eight thousand, four hundred forty-six".