2666666396535 has 36 divisors (see below), whose sum is σ = 4359863854584. Its totient is φ = 1391806871520.

The previous prime is 2666666396533. The next prime is 2666666396557. The reversal of 2666666396535 is 5356936666662.

It is not a de Polignac number, because 2666666396535 - 2¹ = 2666666396533 is a prime.

It is a super-2 number, since 2×2666666396535² (a number of 26 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2666666396535.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2666666396533) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 297249600 + ... + 297258570.

It is an arithmetic number, because the mean of its divisors is an integer number (121107329294).

Almost surely, 2^{2666666396535} is an apocalyptic number.

2666666396535 is a deficient number, since it is larger than the sum of its proper divisors (1693197458049).

2666666396535 is an frugal number, since it uses more digits than its factorization.

2666666396535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18044 (or 9026 counting only the distinct ones).

The product of its digits is 1133740800, while the sum is 69.

The spelling of 2666666396535 in words is "two trillion, six hundred sixty-six billion, six hundred sixty-six million, three hundred ninety-six thousand, five hundred thirty-five".