641668710 has 16 divisors (see below), whose sum is σ = 1540004976. Its totient is φ = 171111648.

The previous prime is 641668693. The next prime is 641668733. The reversal of 641668710 is 17866146.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10694449 + ... + 10694508.

It is an arithmetic number, because the mean of its divisors is an integer number (96250311).

Almost surely, 2^641668710 is an apocalyptic number.

641668710 is an abundant number, since it is smaller than the sum of its proper divisors (898336266).

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

641668710 is a wasteful number, since it uses less digits than its factorization.

641668710 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21388967.

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 641668710 is about 25331.1805883579. The cubic root of 641668710 is about 862.5222107282.

The spelling of 641668710 in words is "six hundred forty-one million, six hundred sixty-eight thousand, seven hundred ten".