2664661199642 has 32 divisors (see below), whose sum is σ = 4310583867408. Its totient is φ = 1228093042176.

The previous prime is 2664661199639. The next prime is 2664661199647. The reversal of 2664661199642 is 2469911664662.

2664661199642 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Cunningham number, because it is equal to 1632379²+1.

It can be written as a sum of positive squares in 8 ways, for example, as 2308239065521 + 356422134121 = 1519289^2 + 597011^2 .

It is not an unprimeable number, because it can be changed into a prime (2664661199647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58319318 + ... + 58364990.

Almost surely, 2^{2664661199642} is an apocalyptic number.

2664661199642 is a deficient number, since it is larger than the sum of its proper divisors (1645922667766).

2664661199642 is a wasteful number, since it uses less digits than its factorization.

2664661199642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48834.

The product of its digits is 40310784, while the sum is 62.

The spelling of 2664661199642 in words is "two trillion, six hundred sixty-four billion, six hundred sixty-one million, one hundred ninety-nine thousand, six hundred forty-two".