2661258204 has 144 divisors (see below), whose sum is σ = 7469594496. Its totient is φ = 792201600.

The previous prime is 2661258169. The next prime is 2661258221. The reversal of 2661258204 is 4028521662.

It is a happy number.

2661258204 is a `hidden beast` number, since 2 + 66 + 12 + 582 + 0 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7669159 + ... + 7669505.

It is an arithmetic number, because the mean of its divisors is an integer number (51872184).

Almost surely, 2^2661258204 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2661258204, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3734797248).

2661258204 is an abundant number, since it is smaller than the sum of its proper divisors (4808336292).

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

2661258204 is a wasteful number, since it uses less digits than its factorization.

2661258204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 656 (or 651 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The square root of 2661258204 is about 51587.3841554309. The cubic root of 2661258204 is about 1385.7844095371.

Adding to 2661258204 its reverse (4028521662), we get a palindrome (6689779866).

The spelling of 2661258204 in words is "two billion, six hundred sixty-one million, two hundred fifty-eight thousand, two hundred four".