2661630 has 16 divisors (see below), whose sum is σ = 6387984. Its totient is φ = 709760.

The previous prime is 2661611. The next prime is 2661641. The reversal of 2661630 is 361662.

It is a self number, because there is not a number n which added to its sum of digits gives 2661630.

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, 44331 + ... + 44390.

It is an arithmetic number, because the mean of its divisors is an integer number (399249).

2^2661630 is an apocalyptic number.

2661630 is an abundant number, since it is smaller than the sum of its proper divisors (3726354).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2661630 is a wasteful number, since it uses less digits than its factorization.

2661630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88731.

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 2661630 is about 1631.4502750620. The cubic root of 2661630 is about 138.5848941057.

Subtracting from 2661630 its reverse (361662), we obtain a cube (2299968 = 132³).

The spelling of 2661630 in words is "two million, six hundred sixty-one thousand, six hundred thirty".