1661384795 has 16 divisors (see below), whose sum is σ = 2398391040. Its totient is φ = 1079275104.

The previous prime is 1661384761. The next prime is 1661384801. The reversal of 1661384795 is 5974831661.

It is a cyclic number.

It is not a de Polignac number, because 1661384795 - 2⁸ = 1661384539 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1248497 + ... + 1249826.

It is an arithmetic number, because the mean of its divisors is an integer number (149899440).

Almost surely, 2^1661384795 is an apocalyptic number.

1661384795 is a deficient number, since it is larger than the sum of its proper divisors (737006245).

1661384795 is a wasteful number, since it uses less digits than its factorization.

1661384795 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2498354.

The product of its digits is 1088640, while the sum is 50.

The square root of 1661384795 is about 40760.0882604540. The cubic root of 1661384795 is about 1184.3773058204.

The spelling of 1661384795 in words is "one billion, six hundred sixty-one million, three hundred eighty-four thousand, seven hundred ninety-five".