1066220394 has 16 divisors (see below), whose sum is σ = 2143492032. Its totient is φ = 353564928.

The previous prime is 1066220383. The next prime is 1066220429. The reversal of 1066220394 is 4930226601.

It is a super-2 number, since 2×1066220394² = 2273651857163030472, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 459214 + ... + 461529.

It is an arithmetic number, because the mean of its divisors is an integer number (133968252).

Almost surely, 2^1066220394 is an apocalyptic number.

1066220394 is an abundant number, since it is smaller than the sum of its proper divisors (1077271638).

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

1066220394 is a wasteful number, since it uses less digits than its factorization.

1066220394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 920941.

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 1066220394 is about 32653.0303953553. The cubic root of 1066220394 is about 1021.6033970839.

Adding to 1066220394 its reverse (4930226601), we get a palindrome (5996446995).

The spelling of 1066220394 in words is "one billion, sixty-six million, two hundred twenty thousand, three hundred ninety-four".