2680696660 has 24 divisors (see below), whose sum is σ = 5658639336. Its totient is φ = 1066721280.

The previous prime is 2680696631. The next prime is 2680696687. The reversal of 2680696660 is 666960862.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 292615236 + 2388081424 = 17106^2 + 48868^2 .

It is a super-2 number, since 2×2680696660² = 14372269165870311200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 343381 + ... + 351100.

It is an arithmetic number, because the mean of its divisors is an integer number (235776639).

Almost surely, 2^2680696660 is an apocalyptic number.

2680696660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2680696660 is an abundant number, since it is smaller than the sum of its proper divisors (2977942676).

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

2680696660 is a wasteful number, since it uses less digits than its factorization.

2680696660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 694683 (or 694681 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 49.

The square root of 2680696660 is about 51775.4445659330. Note that the first 3 decimals coincide. The cubic root of 2680696660 is about 1389.1502595843.

The spelling of 2680696660 in words is "two billion, six hundred eighty million, six hundred ninety-six thousand, six hundred sixty".