1992206665 has 8 divisors (see below), whose sum is σ = 2435754888. Its totient is φ = 1563694080.

The previous prime is 1992206647. The next prime is 1992206681. The reversal of 1992206665 is 5666022991.

It can be written as a sum of positive squares in 4 ways, for example, as 39538944 + 1952667721 = 6288^2 + 44189^2 .

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

It is not a de Polignac number, because 1992206665 - 2⁵ = 1992206633 is a prime.

It is a Duffinian 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, 3758616 + ... + 3759145.

It is an arithmetic number, because the mean of its divisors is an integer number (304469361).

Almost surely, 2^1992206665 is an apocalyptic number.

It is an amenable number.

1992206665 is a deficient number, since it is larger than the sum of its proper divisors (443548223).

1992206665 is an equidigital number, since it uses as much as digits as its factorization.

1992206665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7517819.

The product of its (nonzero) digits is 349920, while the sum is 46.

The square root of 1992206665 is about 44634.1423688190. The cubic root of 1992206665 is about 1258.2824218495.

The spelling of 1992206665 in words is "one billion, nine hundred ninety-two million, two hundred six thousand, six hundred sixty-five".