66406738332 has 48 divisors (see below), whose sum is σ = 169537036032. Its totient is φ = 20063527680.

The previous prime is 66406738289. The next prime is 66406738337. The reversal of 66406738332 is 23383760466.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66406738337) 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, 701928 + ... + 790895.

It is an arithmetic number, because the mean of its divisors is an integer number (3532021584).

Almost surely, 2^66406738332 is an apocalyptic number.

It is an amenable number.

66406738332 is an abundant number, since it is smaller than the sum of its proper divisors (103130297700).

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

66406738332 is a wasteful number, since it uses less digits than its factorization.

66406738332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1493178 (or 1493176 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 48.

The spelling of 66406738332 in words is "sixty-six billion, four hundred six million, seven hundred thirty-eight thousand, three hundred thirty-two".