668076707 has 4 divisors (see below), whose sum is σ = 668129280. Its totient is φ = 668024136.

The previous prime is 668076637. The next prime is 668076719. The reversal of 668076707 is 707670866.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 668076707 - 2¹⁶ = 668011171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (668076797) 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, 5969 + ... + 37037.

It is an arithmetic number, because the mean of its divisors is an integer number (167032320).

Almost surely, 2^668076707 is an apocalyptic number.

668076707 is a deficient number, since it is larger than the sum of its proper divisors (52573).

668076707 is a wasteful number, since it uses less digits than its factorization.

668076707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52572.

The product of its (nonzero) digits is 592704, while the sum is 47.

The square root of 668076707 is about 25847.1798655095. The cubic root of 668076707 is about 874.1959228745.

The spelling of 668076707 in words is "six hundred sixty-eight million, seventy-six thousand, seven hundred seven".