401330660 has 12 divisors (see below), whose sum is σ = 842794428. Its totient is φ = 160532256.

The previous prime is 401330659. The next prime is 401330689. The reversal of 401330660 is 66033104.

It can be written as a sum of positive squares in 2 ways, for example, as 41242084 + 360088576 = 6422^2 + 18976^2 .

It is a super-2 number, since 2×401330660² = 322132597312071200, which contains 22 as substring.

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, 10033247 + ... + 10033286.

It is an arithmetic number, because the mean of its divisors is an integer number (70232869).

Almost surely, 2^401330660 is an apocalyptic number.

It is an amenable number.

401330660 is an abundant number, since it is smaller than the sum of its proper divisors (441463768).

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

401330660 is a wasteful number, since it uses less digits than its factorization.

401330660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20066542 (or 20066540 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 401330660 is about 20033.2388794224. The cubic root of 401330660 is about 737.6224276310.

Adding to 401330660 its reverse (66033104), we get a palindrome (467363764).

The spelling of 401330660 in words is "four hundred one million, three hundred thirty thousand, six hundred sixty".