2660686845 has 16 divisors (see below), whose sum is σ = 4315417152. Its totient is φ = 1399593600.

The previous prime is 2660686843. The next prime is 2660686901. The reversal of 2660686845 is 5486860662.

It is not a de Polignac number, because 2660686845 - 2¹ = 2660686843 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2660686843) 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, 1213831 + ... + 1216020.

It is an arithmetic number, because the mean of its divisors is an integer number (269713572).

Almost surely, 2^2660686845 is an apocalyptic number.

It is an amenable number.

2660686845 is a deficient number, since it is larger than the sum of its proper divisors (1654730307).

2660686845 is a wasteful number, since it uses less digits than its factorization.

2660686845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2429932.

The product of its (nonzero) digits is 3317760, while the sum is 51.

The square root of 2660686845 is about 51581.8460797983. The cubic root of 2660686845 is about 1385.6852287481.

The spelling of 2660686845 in words is "two billion, six hundred sixty million, six hundred eighty-six thousand, eight hundred forty-five".