666249285107 has 8 divisors (see below), whose sum is σ = 769277525856. Its totient is φ = 565183487232.

The previous prime is 666249285029. The next prime is 666249285109. The reversal of 666249285107 is 701582942666.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 666249285107 - 2¹⁴ = 666249268723 is a prime.

It is not an unprimeable number, because it can be changed into a prime (666249285109) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 490609988 + ... + 490611345.

It is an arithmetic number, because the mean of its divisors is an integer number (96159690732).

Almost surely, 2^666249285107 is an apocalyptic number.

666249285107 is a deficient number, since it is larger than the sum of its proper divisors (103028240749).

666249285107 is an equidigital number, since it uses as much as digits as its factorization.

666249285107 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 981221437.

The product of its (nonzero) digits is 8709120, while the sum is 56.

The spelling of 666249285107 in words is "six hundred sixty-six billion, two hundred forty-nine million, two hundred eighty-five thousand, one hundred seven".