2655681 has 8 divisors (see below), whose sum is σ = 4046784. Its totient is φ = 1517520.

The previous prime is 2655661. The next prime is 2655691. The reversal of 2655681 is 1865562.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2655681 - 2¹¹ = 2653633 is a prime.

It is a super-2 number, since 2×2655681² = 14105283147522, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2655661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63210 + ... + 63251.

It is an arithmetic number, because the mean of its divisors is an integer number (505848).

2^2655681 is an apocalyptic number.

2655681 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2655681 is a deficient number, since it is larger than the sum of its proper divisors (1391103).

2655681 is a wasteful number, since it uses less digits than its factorization.

2655681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126471.

The product of its digits is 14400, while the sum is 33.

The square root of 2655681 is about 1629.6260307199. The cubic root of 2655681 is about 138.4815668796.

The spelling of 2655681 in words is "two million, six hundred fifty-five thousand, six hundred eighty-one".