1018666661226 has 32 divisors (see below), whose sum is σ = 2107867224960. Its totient is φ = 327803025984.

The previous prime is 1018666661189. The next prime is 1018666661239. The reversal of 1018666661226 is 6221666668101.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 931171 + ... + 1704233.

It is an arithmetic number, because the mean of its divisors is an integer number (65870850780).

Almost surely, 2^{1018666661226} is an apocalyptic number.

1018666661226 is an abundant number, since it is smaller than the sum of its proper divisors (1089200563734).

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

1018666661226 is a wasteful number, since it uses less digits than its factorization.

1018666661226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 780670.

The product of its (nonzero) digits is 1492992, while the sum is 51.

The spelling of 1018666661226 in words is "one trillion, eighteen billion, six hundred sixty-six million, six hundred sixty-one thousand, two hundred twenty-six".