1664013602 has 4 divisors (see below), whose sum is σ = 2496020406. Its totient is φ = 832006800.

The previous prime is 1664013587. The next prime is 1664013623. The reversal of 1664013602 is 2063104661.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2063104661 = 467 ⋅4417783.

It can be written as a sum of positive squares in only one way, i.e., 925315561 + 738698041 = 30419^2 + 27179^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 416003399 + ... + 416003402.

Almost surely, 2^1664013602 is an apocalyptic number.

1664013602 is a deficient number, since it is larger than the sum of its proper divisors (832006804).

1664013602 is an equidigital number, since it uses as much as digits as its factorization.

1664013602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 832006803.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 1664013602 is about 40792.3228316310. The cubic root of 1664013602 is about 1185.0016561900.

The spelling of 1664013602 in words is "one billion, six hundred sixty-four million, thirteen thousand, six hundred two".