666734067 has 12 divisors (see below), whose sum is σ = 1019711160. Its totient is φ = 418342848.

The previous prime is 666734053. The next prime is 666734069. The reversal of 666734067 is 760437666.

It is not a de Polignac number, because 666734067 - 2⁸ = 666733811 is a prime.

It is not an unprimeable number, because it can be changed into a prime (666734069) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2178717 + ... + 2179022.

It is an arithmetic number, because the mean of its divisors is an integer number (84975930).

Almost surely, 2^666734067 is an apocalyptic number.

666734067 is a deficient number, since it is larger than the sum of its proper divisors (352977093).

666734067 is a wasteful number, since it uses less digits than its factorization.

666734067 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4357762 (or 4357759 counting only the distinct ones).

The product of its (nonzero) digits is 762048, while the sum is 45.

The square root of 666734067 is about 25821.1941435713. The cubic root of 666734067 is about 873.6099035515.

The spelling of 666734067 in words is "six hundred sixty-six million, seven hundred thirty-four thousand, sixty-seven".