400666426404 has 12 divisors (see below), whose sum is σ = 934888328304. Its totient is φ = 133555475464.

The previous prime is 400666426397. The next prime is 400666426427. The reversal of 400666426404 is 404624666004.

It is a tau number, because it is divible by the number of its divisors (12).

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, 16694434422 + ... + 16694434445.

It is an arithmetic number, because the mean of its divisors is an integer number (77907360692).

Almost surely, 2^400666426404 is an apocalyptic number.

It is an amenable number.

400666426404 is an abundant number, since it is smaller than the sum of its proper divisors (534221901900).

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

400666426404 is a wasteful number, since it uses less digits than its factorization.

400666426404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33388868874 (or 33388868872 counting only the distinct ones).

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

The spelling of 400666426404 in words is "four hundred billion, six hundred sixty-six million, four hundred twenty-six thousand, four hundred four".