2666688999998 has 16 divisors (see below), whose sum is σ = 4089993722880. Its totient is φ = 1303685483256.

The previous prime is 2666688999979. The next prime is 2666689000067. The reversal of 2666688999998 is 8999998866662.

It is a super-2 number, since 2×2666688999998² (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 2666688999998.

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, 81914690 + ... + 81947237.

It is an arithmetic number, because the mean of its divisors is an integer number (255624607680).

Almost surely, 2^{2666688999998} is an apocalyptic number.

2666688999998 is a deficient number, since it is larger than the sum of its proper divisors (1423304722882).

2666688999998 is a wasteful number, since it uses less digits than its factorization.

2666688999998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163862111.

The product of its digits is 78364164096, while the sum is 95.

The spelling of 2666688999998 in words is "two trillion, six hundred sixty-six billion, six hundred eighty-eight million, nine hundred ninety-nine thousand, nine hundred ninety-eight".