666310899 has 8 divisors (see below), whose sum is σ = 888881872. Its totient is φ = 443973600.

The previous prime is 666310831. The next prime is 666310901. The reversal of 666310899 is 998013666.

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

It is not a de Polignac number, because 666310899 - 2⁹ = 666310387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (666310819) 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, 51652 + ... + 63249.

It is an arithmetic number, because the mean of its divisors is an integer number (111110234).

Almost surely, 2^666310899 is an apocalyptic number.

666310899 is a deficient number, since it is larger than the sum of its proper divisors (222570973).

666310899 is a wasteful number, since it uses less digits than its factorization.

666310899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116837.

The product of its (nonzero) digits is 419904, while the sum is 48.

The square root of 666310899 is about 25812.9986440940. The cubic root of 666310899 is about 873.4250412439.

The spelling of 666310899 in words is "six hundred sixty-six million, three hundred ten thousand, eight hundred ninety-nine".