2688666477 has 16 divisors (see below), whose sum is σ = 4100259840. Its totient is φ = 1535164272.

The previous prime is 2688666469. The next prime is 2688666493. The reversal of 2688666477 is 7746668862.

It is not a de Polignac number, because 2688666477 - 2³ = 2688666469 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2688666477.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2688666377) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23193 + ... + 76910.

It is an arithmetic number, because the mean of its divisors is an integer number (256266240).

Almost surely, 2^2688666477 is an apocalyptic number.

It is an amenable number.

2688666477 is a deficient number, since it is larger than the sum of its proper divisors (1411593363).

2688666477 is a wasteful number, since it uses less digits than its factorization.

2688666477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101392.

The product of its digits is 32514048, while the sum is 60.

The square root of 2688666477 is about 51852.3526660074. The cubic root of 2688666477 is about 1390.5255637267.

The spelling of 2688666477 in words is "two billion, six hundred eighty-eight million, six hundred sixty-six thousand, four hundred seventy-seven".