668164662 has 72 divisors (see below), whose sum is σ = 1601942472. Its totient is φ = 201261720.

The previous prime is 668164657. The next prime is 668164667. The reversal of 668164662 is 266461866.

It is an interprime number because it is at equal distance from previous prime (668164657) and next prime (668164667).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668164667) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 4000903 + ... + 4001069.

It is an arithmetic number, because the mean of its divisors is an integer number (22249201).

Almost surely, 2^668164662 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 668164662, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (800971236).

668164662 is an abundant number, since it is smaller than the sum of its proper divisors (933777810).

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

668164662 is a wasteful number, since it uses less digits than its factorization.

668164662 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375 (or 183 counting only the distinct ones).

The product of its digits is 497664, while the sum is 45.

The square root of 668164662 is about 25848.8812523869. The cubic root of 668164662 is about 874.2342850004.

The spelling of 668164662 in words is "six hundred sixty-eight million, one hundred sixty-four thousand, six hundred sixty-two".