1066075921 has 16 divisors (see below), whose sum is σ = 1173196800. Its totient is φ = 964223568.

The previous prime is 1066075903. The next prime is 1066075939. The reversal of 1066075921 is 1295706601.

1066075921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (1066075903) and next prime (1066075939).

It is a cyclic number.

It is not a de Polignac number, because 1066075921 - 2¹⁹ = 1065551633 is a prime.

It is a super-2 number, since 2×1066075921² = 2273035738671996482, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1066075961) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 263250 + ... + 267268.

It is an arithmetic number, because the mean of its divisors is an integer number (73324800).

Almost surely, 2^1066075921 is an apocalyptic number.

It is an amenable number.

1066075921 is a deficient number, since it is larger than the sum of its proper divisors (107120879).

1066075921 is a wasteful number, since it uses less digits than its factorization.

1066075921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4668.

The product of its (nonzero) digits is 22680, while the sum is 37.

The square root of 1066075921 is about 32650.8180755092. The cubic root of 1066075921 is about 1021.5572525359.

The spelling of 1066075921 in words is "one billion, sixty-six million, seventy-five thousand, nine hundred twenty-one".