2668551380 has 48 divisors (see below), whose sum is σ = 6117140736. Its totient is φ = 969790080.

The previous prime is 2668551367. The next prime is 2668551437. The reversal of 2668551380 is 831558662.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 535862 + ... + 540818.

It is an arithmetic number, because the mean of its divisors is an integer number (127440432).

Almost surely, 2^2668551380 is an apocalyptic number.

2668551380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2668551380 is an abundant number, since it is smaller than the sum of its proper divisors (3448589356).

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

2668551380 is a wasteful number, since it uses less digits than its factorization.

2668551380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7424 (or 7422 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 44.

The square root of 2668551380 is about 51658.0233845624. The cubic root of 2668551380 is about 1387.0491685749.

The spelling of 2668551380 in words is "two billion, six hundred sixty-eight million, five hundred fifty-one thousand, three hundred eighty".