1662166799 has 4 divisors (see below), whose sum is σ = 1707090264. Its totient is φ = 1617243336.

The previous prime is 1662166787. The next prime is 1662166801. The reversal of 1662166799 is 9976612661.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1662166799 - 2⁸ = 1662166543 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1662166799.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1662066799) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22461677 + ... + 22461750.

It is an arithmetic number, because the mean of its divisors is an integer number (426772566).

Almost surely, 2^1662166799 is an apocalyptic number.

1662166799 is a deficient number, since it is larger than the sum of its proper divisors (44923465).

1662166799 is an equidigital number, since it uses as much as digits as its factorization.

1662166799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44923464.

The product of its digits is 1469664, while the sum is 53.

The square root of 1662166799 is about 40769.6798981792. The cubic root of 1662166799 is about 1184.5631031373.

The spelling of 1662166799 in words is "one billion, six hundred sixty-two million, one hundred sixty-six thousand, seven hundred ninety-nine".