2661442420566 has 16 divisors (see below), whose sum is σ = 5322951972864. Its totient is φ = 887136284904.

The previous prime is 2661442420541. The next prime is 2661442420649. The reversal of 2661442420566 is 6650242441662.

It is a happy number.

It is a super-3 number, since 3×2661442420566³ (a number of 38 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2274250 + ... + 3239613.

It is an arithmetic number, because the mean of its divisors is an integer number (332684498304).

Almost surely, 2^{2661442420566} is an apocalyptic number.

2661442420566 is an abundant number, since it is smaller than the sum of its proper divisors (2661509552298).

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

2661442420566 is a wasteful number, since it uses less digits than its factorization.

2661442420566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5594315.

The product of its (nonzero) digits is 3317760, while the sum is 48.

The spelling of 2661442420566 in words is "two trillion, six hundred sixty-one billion, four hundred forty-two million, four hundred twenty thousand, five hundred sixty-six".