1976006665 has 16 divisors (see below), whose sum is σ = 2428259328. Its totient is φ = 1542954816.

The previous prime is 1976006653. The next prime is 1976006671. The reversal of 1976006665 is 5666006791.

It is a cyclic number.

It is not a de Polignac number, because 1976006665 - 2⁵ = 1976006633 is a prime.

It is a Duffinian number.

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, 76384 + ... + 98926.

It is an arithmetic number, because the mean of its divisors is an integer number (151766208).

Almost surely, 2^1976006665 is an apocalyptic number.

It is an amenable number.

1976006665 is a deficient number, since it is larger than the sum of its proper divisors (452252663).

1976006665 is a wasteful number, since it uses less digits than its factorization.

1976006665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22968.

The product of its (nonzero) digits is 408240, while the sum is 46.

The square root of 1976006665 is about 44452.2965098542. The cubic root of 1976006665 is about 1254.8624823526.

The spelling of 1976006665 in words is "one billion, nine hundred seventy-six million, six thousand, six hundred sixty-five".