666666666732 has 48 divisors (see below), whose sum is σ = 1700426012544. Its totient is φ = 201608736000.

The previous prime is 666666666671. The next prime is 666666666733. The reversal of 666666666732 is 237666666666.

It is a happy number.

666666666732 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 (66).

It is not an unprimeable number, because it can be changed into a prime (666666666733) 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, 5078269 + ... + 5207892.

It is an arithmetic number, because the mean of its divisors is an integer number (35425541928).

Almost surely, 2^666666666732 is an apocalyptic number.

It is an amenable number.

666666666732 is an abundant number, since it is smaller than the sum of its proper divisors (1033759345812).

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

666666666732 is a wasteful number, since it uses less digits than its factorization.

666666666732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10286670 (or 10286668 counting only the distinct ones).

The product of its digits is 423263232, while the sum is 66.

Subtracting from 666666666732 its sum of digits (66), we obtain a palindrome (666666666666).

The spelling of 666666666732 in words is "six hundred sixty-six billion, six hundred sixty-six million, six hundred sixty-six thousand, seven hundred thirty-two".