1664617013 has 16 divisors (see below), whose sum is σ = 1771935744. Its totient is φ = 1561006080.

The previous prime is 1664616997. The next prime is 1664617049. The reversal of 1664617013 is 3107164661.

It is a cyclic number.

It is not a de Polignac number, because 1664617013 - 2⁴ = 1664616997 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 (1664617813) 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 15 ways as a sum of consecutive naturals, for example, 291956 + ... + 297602.

It is an arithmetic number, because the mean of its divisors is an integer number (110745984).

Almost surely, 2^1664617013 is an apocalyptic number.

It is an amenable number.

1664617013 is a deficient number, since it is larger than the sum of its proper divisors (107318731).

1664617013 is a wasteful number, since it uses less digits than its factorization.

1664617013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5972.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 1664617013 is about 40799.7182955961. The cubic root of 1664617013 is about 1185.1448754963.

The spelling of 1664617013 in words is "one billion, six hundred sixty-four million, six hundred seventeen thousand, thirteen".