2690864668 has 24 divisors (see below), whose sum is σ = 4917070368. Its totient is φ = 1286066496.

The previous prime is 2690864629. The next prime is 2690864677. The reversal of 2690864668 is 8664680962.

It is a super-2 number, since 2×2690864668² = 14481505322981500448, 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 (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 139330 + ... + 157462.

It is an arithmetic number, because the mean of its divisors is an integer number (204877932).

Almost surely, 2^2690864668 is an apocalyptic number.

It is an amenable number.

2690864668 is a deficient number, since it is larger than the sum of its proper divisors (2226205700).

2690864668 is a wasteful number, since it uses less digits than its factorization.

2690864668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19773 (or 19771 counting only the distinct ones).

The product of its (nonzero) digits is 5971968, while the sum is 55.

The square root of 2690864668 is about 51873.5449723652. The cubic root of 2690864668 is about 1390.9044142549.

The spelling of 2690864668 in words is "two billion, six hundred ninety million, eight hundred sixty-four thousand, six hundred sixty-eight".