404052666 has 16 divisors (see below), whose sum is σ = 808305888. Its totient is φ = 134650800.

The previous prime is 404052637. The next prime is 404052697. The reversal of 404052666 is 666250404.

404052666 is nontrivially palindromic in base 5.

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, 35721 + ... + 45651.

It is an arithmetic number, because the mean of its divisors is an integer number (50519118).

Almost surely, 2^404052666 is an apocalyptic number.

404052666 is an abundant number, since it is smaller than the sum of its proper divisors (404253222).

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

404052666 is a wasteful number, since it uses less digits than its factorization.

404052666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16717.

The product of its (nonzero) digits is 34560, while the sum is 33.

The square root of 404052666 is about 20101.0613152639. The cubic root of 404052666 is about 739.2863011754.

It can be divided in two parts, 40405 and 2666, that added together give a triangular number (43071 = T₂₉₃).

The spelling of 404052666 in words is "four hundred four million, fifty-two thousand, six hundred sixty-six".