1021066818 has 16 divisors (see below), whose sum is σ = 2162259360. Its totient is φ = 320334656.

The previous prime is 1021066759. The next prime is 1021066831. The reversal of 1021066818 is 8186601201.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax 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, 5005128 + ... + 5005331.

It is an arithmetic number, because the mean of its divisors is an integer number (135141210).

Almost surely, 2^1021066818 is an apocalyptic number.

1021066818 is an abundant number, since it is smaller than the sum of its proper divisors (1141192542).

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

1021066818 is a wasteful number, since it uses less digits than its factorization.

1021066818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10010481.

The product of its (nonzero) digits is 4608, while the sum is 33.

The square root of 1021066818 is about 31954.1361641963. The cubic root of 1021066818 is about 1006.9735295116.

It can be divided in two parts, 10210 and 66818, that added together give a triangular number (77028 = T₃₉₂).

The spelling of 1021066818 in words is "one billion, twenty-one million, sixty-six thousand, eight hundred eighteen".