2668691677 has 4 divisors (see below), whose sum is σ = 2680448256. Its totient is φ = 2656935100.

The previous prime is 2668691651. The next prime is 2668691687. The reversal of 2668691677 is 7761968662.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2668691677 - 2¹¹ = 2668689629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2668691687) 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, 5877949 + ... + 5878402.

It is an arithmetic number, because the mean of its divisors is an integer number (670112064).

Almost surely, 2^2668691677 is an apocalyptic number.

It is an amenable number.

2668691677 is a deficient number, since it is larger than the sum of its proper divisors (11756579).

2668691677 is a wasteful number, since it uses less digits than its factorization.

2668691677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11756578.

The product of its digits is 9144576, while the sum is 58.

The square root of 2668691677 is about 51659.3813067869. The cubic root of 2668691677 is about 1387.0734758237.

The spelling of 2668691677 in words is "two billion, six hundred sixty-eight million, six hundred ninety-one thousand, six hundred seventy-seven".