404033661 has 6 divisors (see below), whose sum is σ = 583604190. Its totient is φ = 269355768.

The previous prime is 404033587. The next prime is 404033699. The reversal of 404033661 is 166330404.

It can be written as a sum of positive squares in only one way, i.e., 377097561 + 26936100 = 19419^2 + 5190^2 .

It is not a de Polignac number, because 404033661 - 2¹³ = 404025469 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404032661) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22446306 + ... + 22446323.

It is an arithmetic number, because the mean of its divisors is an integer number (97267365).

Almost surely, 2^404033661 is an apocalyptic number.

It is an amenable number.

404033661 is a deficient number, since it is larger than the sum of its proper divisors (179570529).

404033661 is a wasteful number, since it uses less digits than its factorization.

404033661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44892635 (or 44892632 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

The square root of 404033661 is about 20100.5885734722. The cubic root of 404033661 is about 739.2747099831.

The spelling of 404033661 in words is "four hundred four million, thirty-three thousand, six hundred sixty-one".