2661133642 has 8 divisors (see below), whose sum is σ = 4036551300. Its totient is φ = 1315616544.

The previous prime is 2661133639. The next prime is 2661133663. The reversal of 2661133642 is 2463311662.

It can be written as a sum of positive squares in 2 ways, for example, as 2626665001 + 34468641 = 51251^2 + 5871^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 2661133598 and 2661133607.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7474917 + ... + 7475272.

Almost surely, 2^2661133642 is an apocalyptic number.

2661133642 is a deficient number, since it is larger than the sum of its proper divisors (1375417658).

2661133642 is a wasteful number, since it uses less digits than its factorization.

2661133642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14950280.

The product of its digits is 31104, while the sum is 34.

The square root of 2661133642 is about 51586.1768500051. The cubic root of 2661133642 is about 1385.7627883392.

The spelling of 2661133642 in words is "two billion, six hundred sixty-one million, one hundred thirty-three thousand, six hundred forty-two".