641166402 has 8 divisors (see below), whose sum is σ = 1282332816. Its totient is φ = 213722132.

The previous prime is 641166391. The next prime is 641166437. The reversal of 641166402 is 204661146.

It is a sphenic number, since it is the product of 3 distinct primes.

641166402 is an admirable number.

It is a super-2 number, since 2×641166402² = 822188710107251208, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 641166402.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53430528 + ... + 53430539.

It is an arithmetic number, because the mean of its divisors is an integer number (160291602).

Almost surely, 2^641166402 is an apocalyptic number.

641166402 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

641166402 is a wasteful number, since it uses less digits than its factorization.

641166402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106861072.

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 641166402 is about 25321.2638310176. The cubic root of 641166402 is about 862.2970868176.

The spelling of 641166402 in words is "six hundred forty-one million, one hundred sixty-six thousand, four hundred two".