2658663 has 28 divisors (see below), whose sum is σ = 4564368. Its totient is φ = 1516320.

The previous prime is 2658661. The next prime is 2658671. The reversal of 2658663 is 3668562.

It is not a de Polignac number, because 2658663 - 2¹ = 2658661 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2658661) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 4843 + ... + 5363.

2^2658663 is an apocalyptic number.

2658663 is a deficient number, since it is larger than the sum of its proper divisors (1905705).

2658663 is an frugal number, since it uses more digits than its factorization.

2658663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 546 (or 531 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 2658663 is about 1630.5407078635. The cubic root of 2658663 is about 138.5333800258.

It can be divided in two parts, 2658 and 663, that added together give a triangular number (3321 = T₈₁).

The spelling of 2658663 in words is "two million, six hundred fifty-eight thousand, six hundred sixty-three".