2665650042 has 96 divisors (see below), whose sum is σ = 6418279296. Its totient is φ = 792806400.

The previous prime is 2665650017. The next prime is 2665650047. The reversal of 2665650042 is 2400565662.

2665650042 is a `hidden beast` number, since 2 + 66 + 56 + 500 + 42 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 2665649979 and 2665650006.

It is not an unprimeable number, because it can be changed into a prime (2665650047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4494898 + ... + 4495490.

It is an arithmetic number, because the mean of its divisors is an integer number (66857076).

Almost surely, 2^2665650042 is an apocalyptic number.

2665650042 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 2665650042, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3209139648).

2665650042 is an abundant number, since it is smaller than the sum of its proper divisors (3752629254).

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

2665650042 is a wasteful number, since it uses less digits than its factorization.

2665650042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 996 (or 993 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

The square root of 2665650042 is about 51629.9335850822. The cubic root of 2665650042 is about 1386.5463042590.

The spelling of 2665650042 in words is "two billion, six hundred sixty-five million, six hundred fifty thousand, forty-two".