666087023 has 4 divisors (see below), whose sum is σ = 761242320. Its totient is φ = 570931728.

The previous prime is 666087011. The next prime is 666087073. The reversal of 666087023 is 320780666.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 666087023 - 2⁸ = 666086767 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666087073) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47577638 + ... + 47577651.

It is an arithmetic number, because the mean of its divisors is an integer number (190310580).

Almost surely, 2^666087023 is an apocalyptic number.

666087023 is a deficient number, since it is larger than the sum of its proper divisors (95155297).

666087023 is an equidigital number, since it uses as much as digits as its factorization.

666087023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95155296.

The product of its (nonzero) digits is 72576, while the sum is 38.

The square root of 666087023 is about 25808.6617824327. The cubic root of 666087023 is about 873.3272086311.

The spelling of 666087023 in words is "six hundred sixty-six million, eighty-seven thousand, twenty-three".