1664011933 has 8 divisors (see below), whose sum is σ = 1694197152. Its totient is φ = 1633984176.

The previous prime is 1664011919. The next prime is 1664011949. The reversal of 1664011933 is 3391104661.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1664011933 - 2²⁵ = 1630457501 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 (1664011133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17935 + ... + 60412.

It is an arithmetic number, because the mean of its divisors is an integer number (211774644).

Almost surely, 2^1664011933 is an apocalyptic number.

It is an amenable number.

1664011933 is a deficient number, since it is larger than the sum of its proper divisors (30185219).

1664011933 is an equidigital number, since it uses as much as digits as its factorization.

1664011933 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78731.

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 1664011933 is about 40792.3023743451. The cubic root of 1664011933 is about 1185.0012600057.

The spelling of 1664011933 in words is "one billion, six hundred sixty-four million, eleven thousand, nine hundred thirty-three".