1664613601 has 16 divisors (see below), whose sum is σ = 1972080000. Its totient is φ = 1374766848.

The previous prime is 1664613589. The next prime is 1664613611. The reversal of 1664613601 is 1063164661.

It is not a de Polignac number, because 1664613601 - 2²³ = 1656224993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1664613611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 93081 + ... + 109513.

It is an arithmetic number, because the mean of its divisors is an integer number (123255000).

Almost surely, 2^1664613601 is an apocalyptic number.

It is an amenable number.

1664613601 is a deficient number, since it is larger than the sum of its proper divisors (307466399).

1664613601 is a wasteful number, since it uses less digits than its factorization.

1664613601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16968.

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 1664613601 is about 40799.6764815605. The cubic root of 1664613601 is about 1185.1440657571.

The spelling of 1664613601 in words is "one billion, six hundred sixty-four million, six hundred thirteen thousand, six hundred one".