400664660244 has 24 divisors (see below), whose sum is σ = 934894913568. Its totient is φ = 133553357280.

The previous prime is 400664660213. The next prime is 400664660273. The reversal of 400664660244 is 442066466004.

It is a junction number, because it is equal to n+sod(n) for n = 400664660196 and 400664660205.

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, 1495654 + ... + 1743074.

It is an arithmetic number, because the mean of its divisors is an integer number (38953954732).

Almost surely, 2^400664660244 is an apocalyptic number.

It is an amenable number.

400664660244 is an abundant number, since it is smaller than the sum of its proper divisors (534230253324).

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

400664660244 is a wasteful number, since it uses less digits than its factorization.

400664660244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 382375 (or 382373 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 42.

The spelling of 400664660244 in words is "four hundred billion, six hundred sixty-four million, six hundred sixty thousand, two hundred forty-four".