666907023 has 8 divisors (see below), whose sum is σ = 889838208. Its totient is φ = 444290264.

The previous prime is 666907001. The next prime is 666907027. The reversal of 666907023 is 320709666.

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

It is a cyclic number.

It is not a de Polignac number, because 666907023 - 2⁶ = 666906959 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666907027) 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, 73611 + ... + 82172.

It is an arithmetic number, because the mean of its divisors is an integer number (111229776).

Almost surely, 2^666907023 is an apocalyptic number.

666907023 is a deficient number, since it is larger than the sum of its proper divisors (222931185).

666907023 is a wasteful number, since it uses less digits than its factorization.

666907023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157213.

The product of its (nonzero) digits is 81648, while the sum is 39.

The square root of 666907023 is about 25824.5430356473. The cubic root of 666907023 is about 873.6854374206.

The spelling of 666907023 in words is "six hundred sixty-six million, nine hundred seven thousand, twenty-three".