2661611262 has 8 divisors (see below), whose sum is σ = 5323222536. Its totient is φ = 887203752.

The previous prime is 2661611261. The next prime is 2661611297. The reversal of 2661611262 is 2621161662.

It is a sphenic number, since it is the product of 3 distinct primes.

2661611262 is an admirable number.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2661611261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 221800933 + ... + 221800944.

It is an arithmetic number, because the mean of its divisors is an integer number (665402817).

Almost surely, 2^2661611262 is an apocalyptic number.

2661611262 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

2661611262 is a wasteful number, since it uses less digits than its factorization.

2661611262 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 443601882.

The product of its digits is 10368, while the sum is 33.

The square root of 2661611262 is about 51590.8059832370. The cubic root of 2661611262 is about 1385.8456889020.

Subtracting from 2661611262 its reverse (2621161662), we obtain a square (40449600 = 6360²).

The spelling of 2661611262 in words is "two billion, six hundred sixty-one million, six hundred eleven thousand, two hundred sixty-two".