1665666232 has 32 divisors (see below), whose sum is σ = 3217302000. Its totient is φ = 807980544.

The previous prime is 1665666221. The next prime is 1665666241. The reversal of 1665666232 is 2326665661.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35008 + ... + 67504.

Almost surely, 2^1665666232 is an apocalyptic number.

It is an amenable number.

1665666232 is a deficient number, since it is larger than the sum of its proper divisors (1551635768).

1665666232 is a wasteful number, since it uses less digits than its factorization.

1665666232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32695 (or 32691 counting only the distinct ones).

The product of its digits is 466560, while the sum is 43.

The square root of 1665666232 is about 40812.5744348479. The cubic root of 1665666232 is about 1185.3938247232.

The spelling of 1665666232 in words is "one billion, six hundred sixty-five million, six hundred sixty-six thousand, two hundred thirty-two".