66796832421 has 48 divisors (see below), whose sum is σ = 114616008000. Its totient is φ = 37029726720.

The previous prime is 66796832419. The next prime is 66796832491. The reversal of 66796832421 is 12423869766.

66796832421 is a `hidden beast` number, since 66 + 79 + 68 + 32 + 421 = 666.

It is not a de Polignac number, because 66796832421 - 2¹ = 66796832419 is a prime.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66796832411) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 557716 + ... + 666813.

It is an arithmetic number, because the mean of its divisors is an integer number (2387833500).

Almost surely, 2^66796832421 is an apocalyptic number.

It is an amenable number.

66796832421 is a deficient number, since it is larger than the sum of its proper divisors (47819175579).

66796832421 is a wasteful number, since it uses less digits than its factorization.

66796832421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1224594 (or 1224591 counting only the distinct ones).

The product of its digits is 5225472, while the sum is 54.

The spelling of 66796832421 in words is "sixty-six billion, seven hundred ninety-six million, eight hundred thirty-two thousand, four hundred twenty-one".