668297070 has 192 divisors, whose sum is σ = 2158940160. Its totient is φ = 139968000.

The previous prime is 668297023. The next prime is 668297137. The reversal of 668297070 is 70792866.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 370170 + ... + 371970.

It is an arithmetic number, because the mean of its divisors is an integer number (11244480).

Almost surely, 2^668297070 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 668297070, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1079470080).

668297070 is an abundant number, since it is smaller than the sum of its proper divisors (1490643090).

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

668297070 is a wasteful number, since it uses less digits than its factorization.

668297070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1871 (or 1868 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 45.

The square root of 668297070 is about 25851.4423195303. The cubic root of 668297070 is about 874.2920292334.

The spelling of 668297070 in words is "six hundred sixty-eight million, two hundred ninety-seven thousand, seventy".