1066645453 has 4 divisors (see below), whose sum is σ = 1066739868. Its totient is φ = 1066551040.

The previous prime is 1066645429. The next prime is 1066645477. The reversal of 1066645453 is 3545466601.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (1066645429) and next prime (1066645477).

It can be written as a sum of positive squares in 2 ways, for example, as 157803844 + 908841609 = 12562^2 + 30147^2 .

It is a cyclic number.

It is not a de Polignac number, because 1066645453 - 2¹³ = 1066637261 is a prime.

It is a super-2 number, since 2×1066645453² = 2275465044811150418, 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 (1066645403) 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, 27526 + ... + 53767.

It is an arithmetic number, because the mean of its divisors is an integer number (266684967).

Almost surely, 2^1066645453 is an apocalyptic number.

It is an amenable number.

1066645453 is a deficient number, since it is larger than the sum of its proper divisors (94415).

1066645453 is an equidigital number, since it uses as much as digits as its factorization.

1066645453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94414.

The product of its (nonzero) digits is 259200, while the sum is 40.

The square root of 1066645453 is about 32659.5384688761. The cubic root of 1066645453 is about 1021.7391363828.

The spelling of 1066645453 in words is "one billion, sixty-six million, six hundred forty-five thousand, four hundred fifty-three".