666672525907 has 6 divisors (see below), whose sum is σ = 675218246388. Its totient is φ = 658233627012.

The previous prime is 666672525889. The next prime is 666672525923. The reversal of 666672525907 is 709525276666.

It is not a de Polignac number, because 666672525907 - 2¹⁵ = 666672493139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (666672525947) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 53404473 + ... + 53416954.

It is an arithmetic number, because the mean of its divisors is an integer number (112536374398).

Almost surely, 2^666672525907 is an apocalyptic number.

666672525907 is a deficient number, since it is larger than the sum of its proper divisors (8545720481).

666672525907 is an equidigital number, since it uses as much as digits as its factorization.

666672525907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106821585 (or 106821506 counting only the distinct ones).

The product of its (nonzero) digits is 57153600, while the sum is 61.

The spelling of 666672525907 in words is "six hundred sixty-six billion, six hundred seventy-two million, five hundred twenty-five thousand, nine hundred seven".