668624770 has 16 divisors (see below), whose sum is σ = 1312936128. Its totient is φ = 243136240.

The previous prime is 668624767. The next prime is 668624779. The reversal of 668624770 is 77426866.

It is a self number, because there is not a number n which added to its sum of digits gives 668624770.

It is not an unprimeable number, because it can be changed into a prime (668624779) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3039094 + ... + 3039313.

It is an arithmetic number, because the mean of its divisors is an integer number (82058508).

Almost surely, 2^668624770 is an apocalyptic number.

668624770 is a deficient number, since it is larger than the sum of its proper divisors (644311358).

668624770 is a wasteful number, since it uses less digits than its factorization.

668624770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6078425.

The product of its (nonzero) digits is 677376, while the sum is 46.

The square root of 668624770 is about 25857.7796803979. The cubic root of 668624770 is about 874.4349091463.

The spelling of 668624770 in words is "six hundred sixty-eight million, six hundred twenty-four thousand, seven hundred seventy".