1111226666655 has 64 divisors (see below), whose sum is σ = 2106665164800. Its totient is φ = 489455516160.

The previous prime is 1111226666629. The next prime is 1111226666663. The reversal of 1111226666655 is 5566666221111.

1111226666655 is a nontrivial binomial coefficient, being equal to C(1490790, 2).

It is not a de Polignac number, because 1111226666655 - 2⁷ = 1111226666527 is a prime.

It is a zygodrome in base 10.

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, 1 + ... + 1490789.

It is an arithmetic number, because the mean of its divisors is an integer number (32916643200).

Almost surely, 2^{1111226666655} is an apocalyptic number.

1111226666655 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1111226666655 is the 1490789-th triangular number and also the 745395-th hexagonal number.

1111226666655 is a deficient number, since it is larger than the sum of its proper divisors (995438498145).

1111226666655 is a wasteful number, since it uses less digits than its factorization.

1111226666655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1491064.

The product of its digits is 777600, while the sum is 48.

The spelling of 1111226666655 in words is "one trillion, one hundred eleven billion, two hundred twenty-six million, six hundred sixty-six thousand, six hundred fifty-five".