1066021888 has 44 divisors (see below), whose sum is σ = 2138574592. Its totient is φ = 531118080.

The previous prime is 1066021867. The next prime is 1066021897. The reversal of 1066021888 is 8881206601.

It is a super-2 number, since 2×1066021888² = 2272805331390169088, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1066021888.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 312673 + ... + 316063.

It is an arithmetic number, because the mean of its divisors is an integer number (48603968).

Almost surely, 2^1066021888 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1066021888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1069287296).

1066021888 is an abundant number, since it is smaller than the sum of its proper divisors (1072552704).

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

1066021888 is an equidigital number, since it uses as much as digits as its factorization.

1066021888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3718 (or 3700 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 40.

The square root of 1066021888 is about 32649.9906278700. The cubic root of 1066021888 is about 1021.5399933725.

The spelling of 1066021888 in words is "one billion, sixty-six million, twenty-one thousand, eight hundred eighty-eight".