1066582821 has 4 divisors (see below), whose sum is σ = 1422110432. Its totient is φ = 711055212.

The previous prime is 1066582813. The next prime is 1066582823. The reversal of 1066582821 is 1282856601.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1066582821 - 2³ = 1066582813 is a prime.

It is a super-2 number, since 2×1066582821² = 2275197828104636082, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1066582821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1066582823) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 177763801 + ... + 177763806.

It is an arithmetic number, because the mean of its divisors is an integer number (355527608).

Almost surely, 2^1066582821 is an apocalyptic number.

It is an amenable number.

1066582821 is a deficient number, since it is larger than the sum of its proper divisors (355527611).

1066582821 is an equidigital number, since it uses as much as digits as its factorization.

1066582821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355527610.

The product of its (nonzero) digits is 46080, while the sum is 39.

The square root of 1066582821 is about 32658.5795925052. The cubic root of 1066582821 is about 1021.7191376044.

The spelling of 1066582821 in words is "one billion, sixty-six million, five hundred eighty-two thousand, eight hundred twenty-one".