1066644402 has 8 divisors (see below), whose sum is σ = 2133288816. Its totient is φ = 355548132.

The previous prime is 1066644323. The next prime is 1066644407. The reversal of 1066644402 is 2044466601.

It is a sphenic number, since it is the product of 3 distinct primes.

1066644402 is an admirable number.

It is a super-2 number, since 2×1066644402² = 2275460560635875208, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1066644407) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 88887028 + ... + 88887039.

It is an arithmetic number, because the mean of its divisors is an integer number (266661102).

Almost surely, 2^1066644402 is an apocalyptic number.

1066644402 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1066644402 is a wasteful number, since it uses less digits than its factorization.

1066644402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177774072.

The product of its (nonzero) digits is 27648, while the sum is 33.

The square root of 1066644402 is about 32659.5223786264. The cubic root of 1066644402 is about 1021.7388007986.

The spelling of 1066644402 in words is "one billion, sixty-six million, six hundred forty-four thousand, four hundred two".