407506661 has 4 divisors (see below), whose sum is σ = 428954400. Its totient is φ = 386058924.

The previous prime is 407506651. The next prime is 407506669. The reversal of 407506661 is 166605704.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 407506661 - 2⁶ = 407506597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (407506669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10723841 + ... + 10723878.

It is an arithmetic number, because the mean of its divisors is an integer number (107238600).

Almost surely, 2^407506661 is an apocalyptic number.

It is an amenable number.

407506661 is a deficient number, since it is larger than the sum of its proper divisors (21447739).

407506661 is a wasteful number, since it uses less digits than its factorization.

407506661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21447738.

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 407506661 is about 20186.7942229567. The cubic root of 407506661 is about 741.3868932448.

The spelling of 407506661 in words is "four hundred seven million, five hundred six thousand, six hundred sixty-one".