2666342642605 has 64 divisors (see below), whose sum is σ = 3613759142400. Its totient is φ = 1879587763200.

The previous prime is 2666342642527. The next prime is 2666342642611. The reversal of 2666342642605 is 5062462436662.

It is not a de Polignac number, because 2666342642605 - 2³¹ = 2664195158957 is a prime.

It is a super-2 number, since 2×2666342642605² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 10165944 + ... + 10424926.

It is an arithmetic number, because the mean of its divisors is an integer number (56464986600).

Almost surely, 2^{2666342642605} is an apocalyptic number.

It is an amenable number.

2666342642605 is a deficient number, since it is larger than the sum of its proper divisors (947416499795).

2666342642605 is a wasteful number, since it uses less digits than its factorization.

2666342642605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259174.

The product of its (nonzero) digits is 14929920, while the sum is 52.

The spelling of 2666342642605 in words is "two trillion, six hundred sixty-six billion, three hundred forty-two million, six hundred forty-two thousand, six hundred five".