1664235163 has 4 divisors (see below), whose sum is σ = 1665597168. Its totient is φ = 1662873160.

The previous prime is 1664235161. The next prime is 1664235193. The reversal of 1664235163 is 3615324661.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1664235163 - 2¹ = 1664235161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1664235161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 679168 + ... + 681613.

It is an arithmetic number, because the mean of its divisors is an integer number (416399292).

Almost surely, 2^1664235163 is an apocalyptic number.

1664235163 is a deficient number, since it is larger than the sum of its proper divisors (1362005).

1664235163 is a wasteful number, since it uses less digits than its factorization.

1664235163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1362004.

The product of its digits is 77760, while the sum is 37.

The square root of 1664235163 is about 40795.0384605775. The cubic root of 1664235163 is about 1185.0542476071.

The spelling of 1664235163 in words is "one billion, six hundred sixty-four million, two hundred thirty-five thousand, one hundred sixty-three".