668793069 has 24 divisors (see below), whose sum is σ = 1105408512. Its totient is φ = 381693600.

The previous prime is 668793023. The next prime is 668793071. The reversal of 668793069 is 960397866.

It is a happy number.

It is not a de Polignac number, because 668793069 - 2⁹ = 668792557 is a prime.

It is a super-2 number, since 2×668793069² = 894568338284877522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668793089) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 48219 + ... + 60519.

It is an arithmetic number, because the mean of its divisors is an integer number (46058688).

Almost surely, 2^668793069 is an apocalyptic number.

It is an amenable number.

668793069 is a deficient number, since it is larger than the sum of its proper divisors (436615443).

668793069 is a wasteful number, since it uses less digits than its factorization.

668793069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13177 (or 13174 counting only the distinct ones).

The product of its (nonzero) digits is 2939328, while the sum is 54.

The square root of 668793069 is about 25861.0337960415. The cubic root of 668793069 is about 874.5082707592.

The spelling of 668793069 in words is "six hundred sixty-eight million, seven hundred ninety-three thousand, sixty-nine".