666666740732 has 12 divisors (see below), whose sum is σ = 1168374951576. Its totient is φ = 332845326000.

The previous prime is 666666740731. The next prime is 666666740767. The reversal of 666666740732 is 237047666666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666666740731) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122008019 + ... + 122013482.

It is an arithmetic number, because the mean of its divisors is an integer number (97364579298).

Almost surely, 2^666666740732 is an apocalyptic number.

It is an amenable number.

666666740732 is a deficient number, since it is larger than the sum of its proper divisors (501708210844).

666666740732 is a wasteful number, since it uses less digits than its factorization.

666666740732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244022188 (or 244022186 counting only the distinct ones).

The product of its (nonzero) digits is 54867456, while the sum is 59.

The spelling of 666666740732 in words is "six hundred sixty-six billion, six hundred sixty-six million, seven hundred forty thousand, seven hundred thirty-two".