666706777734 has 32 divisors (see below), whose sum is σ = 1352313905760. Its totient is φ = 219088392192.

The previous prime is 666706777703. The next prime is 666706777741. The reversal of 666706777734 is 437777607666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 579862 + ... + 1292150.

It is an arithmetic number, because the mean of its divisors is an integer number (42259809555).

Almost surely, 2^666706777734 is an apocalyptic number.

666706777734 is an abundant number, since it is smaller than the sum of its proper divisors (685607128026).

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

666706777734 is a wasteful number, since it uses less digits than its factorization.

666706777734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 714504.

The product of its (nonzero) digits is 261382464, while the sum is 66.

The spelling of 666706777734 in words is "six hundred sixty-six billion, seven hundred six million, seven hundred seventy-seven thousand, seven hundred thirty-four".