2665947697 has 8 divisors (see below), whose sum is σ = 3060104000. Its totient is φ = 2275118064.

The previous prime is 2665947679. The next prime is 2665947707. The reversal of 2665947697 is 7967495662.

2665947697 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 2665947697 - 2²⁷ = 2531729969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2665947197) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 829947 + ... + 833152.

It is an arithmetic number, because the mean of its divisors is an integer number (382513000).

Almost surely, 2^2665947697 is an apocalyptic number.

It is an amenable number.

2665947697 is a deficient number, since it is larger than the sum of its proper divisors (394156303).

2665947697 is a wasteful number, since it uses less digits than its factorization.

2665947697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1663335.

The product of its digits is 34292160, while the sum is 61.

The square root of 2665947697 is about 51632.8160862837. The cubic root of 2665947697 is about 1386.5979110682.

The spelling of 2665947697 in words is "two billion, six hundred sixty-five million, nine hundred forty-seven thousand, six hundred ninety-seven".