666868335 has 16 divisors (see below), whose sum is σ = 1219416576. Its totient is φ = 304854048.

The previous prime is 666868331. The next prime is 666868337. The reversal of 666868335 is 533868666.

It is not a de Polignac number, because 666868335 - 2² = 666868331 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666868331) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3175459 + ... + 3175668.

It is an arithmetic number, because the mean of its divisors is an integer number (76213536).

Almost surely, 2^666868335 is an apocalyptic number.

666868335 is a deficient number, since it is larger than the sum of its proper divisors (552548241).

666868335 is a wasteful number, since it uses less digits than its factorization.

666868335 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6351142.

The product of its digits is 3732480, while the sum is 51.

The square root of 666868335 is about 25823.7939699030. The cubic root of 666868335 is about 873.6685426138.

The spelling of 666868335 in words is "six hundred sixty-six million, eight hundred sixty-eight thousand, three hundred thirty-five".