66406722384 has 40 divisors (see below), whose sum is σ = 171637630560. Its totient is φ = 22124357248.

The previous prime is 66406722313. The next prime is 66406722457. The reversal of 66406722384 is 48322760466.

66406722384 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 254547 + ... + 444530.

It is an arithmetic number, because the mean of its divisors is an integer number (4290940764).

Almost surely, 2^66406722384 is an apocalyptic number.

It is an amenable number.

66406722384 is an abundant number, since it is smaller than the sum of its proper divisors (105230908176).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66406722384 is a wasteful number, since it uses less digits than its factorization.

66406722384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 701067 (or 701061 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 48.

The spelling of 66406722384 in words is "sixty-six billion, four hundred six million, seven hundred twenty-two thousand, three hundred eighty-four".