2660712642 has 72 divisors (see below), whose sum is σ = 6713824572. Its totient is φ = 759326400.

The previous prime is 2660712601. The next prime is 2660712647. The reversal of 2660712642 is 2462170662.

2660712642 is a `hidden beast` number, since 2 + 6 + 6 + 0 + 7 + 1 + 2 + 642 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 2516928561 + 143784081 = 50169^2 + 11991^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2660712597 and 2660712606.

It is not an unprimeable number, because it can be changed into a prime (2660712647) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1428792 + ... + 1430652.

Almost surely, 2^2660712642 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2660712642, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3356912286).

2660712642 is an abundant number, since it is smaller than the sum of its proper divisors (4053111930).

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

2660712642 is a wasteful number, since it uses less digits than its factorization.

2660712642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3504 (or 3494 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 36.

The square root of 2660712642 is about 51582.0961380981. The cubic root of 2660712642 is about 1385.6897070913.

The spelling of 2660712642 in words is "two billion, six hundred sixty million, seven hundred twelve thousand, six hundred forty-two".