2686660380 has 48 divisors (see below), whose sum is σ = 8358500640. Its totient is φ = 716442624.

The previous prime is 2686660367. The next prime is 2686660397. The reversal of 2686660380 is 830666862.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2487109 + ... + 2488188.

It is an arithmetic number, because the mean of its divisors is an integer number (174135430).

Almost surely, 2^2686660380 is an apocalyptic number.

2686660380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2686660380 is an abundant number, since it is smaller than the sum of its proper divisors (5671840260).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2686660380 is a wasteful number, since it uses less digits than its factorization.

2686660380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4975315 (or 4975307 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 45.

The square root of 2686660380 is about 51833.0047363646. The cubic root of 2686660380 is about 1390.1796396713.

The spelling of 2686660380 in words is "two billion, six hundred eighty-six million, six hundred sixty thousand, three hundred eighty".