1066428623 has 16 divisors (see below), whose sum is σ = 1159548096. Its totient is φ = 974937600.

The previous prime is 1066428619. The next prime is 1066428673. The reversal of 1066428623 is 3268246601.

It is not a de Polignac number, because 1066428623 - 2² = 1066428619 is a prime.

It is a super-2 number, since 2×1066428623² = 2274540015907352258, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1066428673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 817790 + ... + 819092.

It is an arithmetic number, because the mean of its divisors is an integer number (72471756).

Almost surely, 2^1066428623 is an apocalyptic number.

1066428623 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1066428623 is a deficient number, since it is larger than the sum of its proper divisors (93119473).

1066428623 is a wasteful number, since it uses less digits than its factorization.

1066428623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1874.

The product of its (nonzero) digits is 82944, while the sum is 38.

The square root of 1066428623 is about 32656.2187492673. The cubic root of 1066428623 is about 1021.6698979087.

The spelling of 1066428623 in words is "one billion, sixty-six million, four hundred twenty-eight thousand, six hundred twenty-three".