404406660020 has 96 divisors (see below), whose sum is σ = 999465578496. Its totient is φ = 135795046400.

The previous prime is 404406660019. The next prime is 404406660023. The reversal of 404406660020 is 20066604404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404406660023) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 821876 + ... + 1218315.

It is an arithmetic number, because the mean of its divisors is an integer number (10411099776).

Almost surely, 2^404406660020 is an apocalyptic number.

It is an amenable number.

404406660020 is an abundant number, since it is smaller than the sum of its proper divisors (595058918476).

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

404406660020 is a wasteful number, since it uses less digits than its factorization.

404406660020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2040281 (or 2040279 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 32.

The spelling of 404406660020 in words is "four hundred four billion, four hundred six million, six hundred sixty thousand, twenty".