1665232664 has 32 divisors (see below), whose sum is σ = 3242106000. Its totient is φ = 800886912.

The previous prime is 1665232661. The next prime is 1665232721. The reversal of 1665232664 is 4662325661.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1665232661) 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, 49067 + ... + 75749.

Almost surely, 2^1665232664 is an apocalyptic number.

It is an amenable number.

1665232664 is a deficient number, since it is larger than the sum of its proper divisors (1576873336).

1665232664 is a wasteful number, since it uses less digits than its factorization.

1665232664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26987 (or 26983 counting only the distinct ones).

The product of its digits is 311040, while the sum is 41.

The square root of 1665232664 is about 40807.2623928634. The cubic root of 1665232664 is about 1185.2909642943.

The spelling of 1665232664 in words is "one billion, six hundred sixty-five million, two hundred thirty-two thousand, six hundred sixty-four".