1666432402 has 8 divisors (see below), whose sum is σ = 2499862896. Its totient is φ = 833144772.

The previous prime is 1666432321. The next prime is 1666432421. The reversal of 1666432402 is 2042346661.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 993 + ... + 57739.

It is an arithmetic number, because the mean of its divisors is an integer number (312482862).

Almost surely, 2^1666432402 is an apocalyptic number.

1666432402 is a deficient number, since it is larger than the sum of its proper divisors (833430494).

1666432402 is a wasteful number, since it uses less digits than its factorization.

1666432402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71432.

The product of its (nonzero) digits is 41472, while the sum is 34.

The square root of 1666432402 is about 40821.9598010679. The cubic root of 1666432402 is about 1185.5755485988.

The spelling of 1666432402 in words is "one billion, six hundred sixty-six million, four hundred thirty-two thousand, four hundred two".