404512661 has 8 divisors (see below), whose sum is σ = 482400384. Its totient is φ = 331650000.

The previous prime is 404512649. The next prime is 404512681. The reversal of 404512661 is 166215404.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 404512661 - 2²² = 400318357 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404512681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1256090 + ... + 1256411.

It is an arithmetic number, because the mean of its divisors is an integer number (60300048).

Almost surely, 2^404512661 is an apocalyptic number.

It is an amenable number.

404512661 is a deficient number, since it is larger than the sum of its proper divisors (77887723).

404512661 is a wasteful number, since it uses less digits than its factorization.

404512661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2512531.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 404512661 is about 20112.5001180858. The cubic root of 404512661 is about 739.5667423669.

The spelling of 404512661 in words is "four hundred four million, five hundred twelve thousand, six hundred sixty-one".