2663682021 has 72 divisors (see below), whose sum is σ = 5205258240. Its totient is φ = 1277242560.

The previous prime is 2663682019. The next prime is 2663682023. The reversal of 2663682021 is 1202863662.

It is an interprime number because it is at equal distance from previous prime (2663682019) and next prime (2663682023).

It is not a de Polignac number, because 2663682021 - 2¹ = 2663682019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2663682023) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 85660 + ... + 112538.

Almost surely, 2^2663682021 is an apocalyptic number.

2663682021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2663682021 is a deficient number, since it is larger than the sum of its proper divisors (2541576219).

2663682021 is a wasteful number, since it uses less digits than its factorization.

2663682021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26927 (or 26913 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 2663682021 is about 51610.8711513379. The cubic root of 2663682021 is about 1386.2049961336.

The spelling of 2663682021 in words is "two billion, six hundred sixty-three million, six hundred eighty-two thousand, twenty-one".