664162011 has 28 divisors (see below), whose sum is σ = 1027944640. Its totient is φ = 428477040.

The previous prime is 664161983. The next prime is 664162021. The reversal of 664162011 is 110261466.

664162011 is a `hidden beast` number, since 6 + 641 + 6 + 2 + 0 + 11 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-664162011 is a prime.

It is a super-2 number, since 2×664162011² = 882222353711128242, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (664162021) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 7905 + ... + 37293.

Almost surely, 2^664162011 is an apocalyptic number.

664162011 is a deficient number, since it is larger than the sum of its proper divisors (363782629).

664162011 is an equidigital number, since it uses as much as digits as its factorization.

664162011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29438 (or 29423 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 664162011 is about 25771.3408847891. The cubic root of 664162011 is about 872.4850826808.

The spelling of 664162011 in words is "six hundred sixty-four million, one hundred sixty-two thousand, eleven".