668007756 has 48 divisors (see below), whose sum is σ = 1865096800. Its totient is φ = 205540416.

The previous prime is 668007751. The next prime is 668007763. The reversal of 668007756 is 657700866.

It is not an unprimeable number, because it can be changed into a prime (668007751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 236491 + ... + 239298.

Almost surely, 2^668007756 is an apocalyptic number.

It is an amenable number.

668007756 is an abundant number, since it is smaller than the sum of its proper divisors (1197089044).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

668007756 is a wasteful number, since it uses less digits than its factorization.

668007756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 475815 (or 475807 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 45.

The square root of 668007756 is about 25845.8460105294. The cubic root of 668007756 is about 874.1658471081.

The spelling of 668007756 in words is "six hundred sixty-eight million, seven thousand, seven hundred fifty-six".