406665013 has 4 divisors (see below), whose sum is σ = 407008800. Its totient is φ = 406321228.

The previous prime is 406664989. The next prime is 406665023. The reversal of 406665013 is 310566604.

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 406665013 - 2⁵ = 406664981 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 (406665023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 170113 + ... + 172486.

It is an arithmetic number, because the mean of its divisors is an integer number (101752200).

Almost surely, 2^406665013 is an apocalyptic number.

It is an amenable number.

406665013 is a deficient number, since it is larger than the sum of its proper divisors (343787).

406665013 is a wasteful number, since it uses less digits than its factorization.

406665013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343786.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 406665013 is about 20165.9369482303. The cubic root of 406665013 is about 740.8761311436.

The spelling of 406665013 in words is "four hundred six million, six hundred sixty-five thousand, thirteen".