2661327786 has 48 divisors (see below), whose sum is σ = 5891435424. Its totient is φ = 796706496.

The previous prime is 2661327761. The next prime is 2661327817. The reversal of 2661327786 is 6877231662.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 94321 + ... + 119243.

It is an arithmetic number, because the mean of its divisors is an integer number (122738238).

Almost surely, 2^2661327786 is an apocalyptic number.

2661327786 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 2661327786, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2945717712).

2661327786 is an abundant number, since it is smaller than the sum of its proper divisors (3230107638).

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

2661327786 is a wasteful number, since it uses less digits than its factorization.

2661327786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25015 (or 24978 counting only the distinct ones).

The product of its digits is 1016064, while the sum is 48.

The square root of 2661327786 is about 51588.0585600970. The cubic root of 2661327786 is about 1385.7964871338.

The spelling of 2661327786 in words is "two billion, six hundred sixty-one million, three hundred twenty-seven thousand, seven hundred eighty-six".