1664600613 has 16 divisors (see below), whose sum is σ = 2413407360. Its totient is φ = 1014421824.

The previous prime is 1664600603. The next prime is 1664600629. The reversal of 1664600613 is 3160064661.

1664600613 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1664600613 - 2⁶ = 1664600549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1664600603) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 203178 + ... + 211211.

It is an arithmetic number, because the mean of its divisors is an integer number (150837960).

Almost surely, 2^1664600613 is an apocalyptic number.

1664600613 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1664600613 is a deficient number, since it is larger than the sum of its proper divisors (748806747).

1664600613 is a wasteful number, since it uses less digits than its factorization.

1664600613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 414508.

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 1664600613 is about 40799.5173133212. The cubic root of 1664600613 is about 1185.1409834219.

The spelling of 1664600613 in words is "one billion, six hundred sixty-four million, six hundred thousand, six hundred thirteen".