666662373 has 16 divisors (see below), whose sum is σ = 1063621440. Its totient is φ = 410253552.

The previous prime is 666662363. The next prime is 666662393. The reversal of 666662373 is 373266666.

It is not a de Polignac number, because 666662373 - 2⁶ = 666662309 is a prime.

It is a super-2 number, since 2×666662373² = 888877439147982258, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666662303) 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, 949311 + ... + 950012.

It is an arithmetic number, because the mean of its divisors is an integer number (66476340).

Almost surely, 2^666662373 is an apocalyptic number.

It is an amenable number.

666662373 is a deficient number, since it is larger than the sum of its proper divisors (396959067).

666662373 is a wasteful number, since it uses less digits than its factorization.

666662373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1899345 (or 1899339 counting only the distinct ones).

The product of its digits is 979776, while the sum is 45.

The square root of 666662373 is about 25819.8058280848. The cubic root of 666662373 is about 873.5785893006.

The spelling of 666662373 in words is "six hundred sixty-six million, six hundred sixty-two thousand, three hundred seventy-three".