666733707 has 16 divisors (see below), whose sum is σ = 996820000. Its totient is φ = 440409312.

The previous prime is 666733679. The next prime is 666733757. The reversal of 666733707 is 707337666.

It is not a de Polignac number, because 666733707 - 2¹⁰ = 666732683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (666733757) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 110332 + ... + 116217.

It is an arithmetic number, because the mean of its divisors is an integer number (62301250).

Almost surely, 2^666733707 is an apocalyptic number.

666733707 is a deficient number, since it is larger than the sum of its proper divisors (330086293).

666733707 is a wasteful number, since it uses less digits than its factorization.

666733707 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226667 (or 226661 counting only the distinct ones).

The product of its (nonzero) digits is 666792, while the sum is 45.

The square root of 666733707 is about 25821.1871725527. The cubic root of 666733707 is about 873.6097463176.

The spelling of 666733707 in words is "six hundred sixty-six million, seven hundred thirty-three thousand, seven hundred seven".