666302945 has 16 divisors (see below), whose sum is σ = 996859008. Its totient is φ = 415357440.

The previous prime is 666302941. The next prime is 666302951. The reversal of 666302945 is 549203666.

It is not a de Polignac number, because 666302945 - 2² = 666302941 is a prime.

It is a super-2 number, since 2×666302945² = 887919229031346050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (666302941) by changing a digit.

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, 864944 + ... + 865713.

It is an arithmetic number, because the mean of its divisors is an integer number (62303688).

Almost surely, 2^666302945 is an apocalyptic number.

It is an amenable number.

666302945 is a deficient number, since it is larger than the sum of its proper divisors (330556063).

666302945 is a wasteful number, since it uses less digits than its factorization.

666302945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1730680.

The product of its (nonzero) digits is 233280, while the sum is 41.

The square root of 666302945 is about 25812.8445739713. The cubic root of 666302945 is about 873.4215657640.

The spelling of 666302945 in words is "six hundred sixty-six million, three hundred two thousand, nine hundred forty-five".