2661633 has 16 divisors (see below), whose sum is σ = 4247040. Its totient is φ = 1637712.

The previous prime is 2661611. The next prime is 2661641. The reversal of 2661633 is 3361662.

2661633 is a `hidden beast` number, since 26 + 6 + 1 + 633 = 666.

It is not a de Polignac number, because 2661633 - 2⁶ = 2661569 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

2661633 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 2661597 and 2661606.

It is not an unprimeable number, because it can be changed into a prime (2661643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3441 + ... + 4142.

It is an arithmetic number, because the mean of its divisors is an integer number (265440).

2^2661633 is an apocalyptic number.

It is an amenable number.

2661633 is a deficient number, since it is larger than the sum of its proper divisors (1585407).

2661633 is a wasteful number, since it uses less digits than its factorization.

2661633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7605 (or 7599 counting only the distinct ones).

The product of its digits is 3888, while the sum is 27.

The square root of 2661633 is about 1631.4511944891. The cubic root of 2661633 is about 138.5849461733.

The spelling of 2661633 in words is "two million, six hundred sixty-one thousand, six hundred thirty-three".