2661321632 has 12 divisors (see below), whose sum is σ = 5239477026. Its totient is φ = 1330660800.

The previous prime is 2661321617. The next prime is 2661321713. The reversal of 2661321632 is 2361231662.

It can be written as a sum of positive squares in only one way, i.e., 2346046096 + 315275536 = 48436^2 + 17756^2 .

It is a super-2 number, since 2×2661321632² = 14165265657902286848, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (32), and also a Moran number because the ratio is a prime number: 83166301 = 2661321632 / (2 + 6 + 6 + 1 + 3 + 2 + 1 + 6 + 3 + 2).

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 as a sum of consecutive naturals, namely, 41583119 + ... + 41583182.

Almost surely, 2^2661321632 is an apocalyptic number.

It is an amenable number.

2661321632 is a deficient number, since it is larger than the sum of its proper divisors (2578155394).

2661321632 is an equidigital number, since it uses as much as digits as its factorization.

2661321632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83166311 (or 83166303 counting only the distinct ones).

The product of its digits is 15552, while the sum is 32.

The square root of 2661321632 is about 51587.9989144762. The cubic root of 2661321632 is about 1385.7954189705.

The spelling of 2661321632 in words is "two billion, six hundred sixty-one million, three hundred twenty-one thousand, six hundred thirty-two".