2660064642 has 12 divisors (see below), whose sum is σ = 5763473430. Its totient is φ = 886688208.

The previous prime is 2660064623. The next prime is 2660064653. The reversal of 2660064642 is 2464600662.

2660064642 is a `hidden beast` number, since 2 + 6 + 6 + 0 + 0 + 6 + 4 + 642 = 666.

2660064642 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 2287613241 + 372451401 = 47829^2 + 19299^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2660064597 and 2660064606.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 73890667 + ... + 73890702.

Almost surely, 2^2660064642 is an apocalyptic number.

2660064642 is an abundant number, since it is smaller than the sum of its proper divisors (3103408788).

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

2660064642 is a wasteful number, since it uses less digits than its factorization.

2660064642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147781377 (or 147781374 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 36.

The square root of 2660064642 is about 51575.8145064138. The cubic root of 2660064642 is about 1385.5772059239.

The spelling of 2660064642 in words is "two billion, six hundred sixty million, sixty-four thousand, six hundred forty-two".