2661203804 has 48 divisors (see below), whose sum is σ = 5503819776. Its totient is φ = 1101772800.

The previous prime is 2661203803. The next prime is 2661203911. The reversal of 2661203804 is 4083021662.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2661203803) 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, 553997 + ... + 558779.

It is an arithmetic number, because the mean of its divisors is an integer number (114662912).

Almost surely, 2^2661203804 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 2661203804, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2751909888).

2661203804 is an abundant number, since it is smaller than the sum of its proper divisors (2842615972).

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

2661203804 is a wasteful number, since it uses less digits than its factorization.

2661203804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5466 (or 5464 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 2661203804 is about 51586.8568920418. The cubic root of 2661203804 is about 1385.7749669878.

The spelling of 2661203804 in words is "two billion, six hundred sixty-one million, two hundred three thousand, eight hundred four".