1660106665 has 16 divisors (see below), whose sum is σ = 2396545920. Its totient is φ = 1078444800.

The previous prime is 1660106641. The next prime is 1660106671. The reversal of 1660106665 is 5666010661.

It is not a de Polignac number, because 1660106665 - 2¹¹ = 1660104617 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, 1247536 + ... + 1248865.

It is an arithmetic number, because the mean of its divisors is an integer number (149784120).

Almost surely, 2^1660106665 is an apocalyptic number.

It is an amenable number.

1660106665 is a deficient number, since it is larger than the sum of its proper divisors (736439255).

1660106665 is a wasteful number, since it uses less digits than its factorization.

1660106665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2496432.

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 1660106665 is about 40744.4065486295. The cubic root of 1660106665 is about 1184.0735077418.

The spelling of 1660106665 in words is "one billion, six hundred sixty million, one hundred six thousand, six hundred sixty-five".