1066645625 has 10 divisors (see below), whose sum is σ = 1332881154. Its totient is φ = 853316000.

The previous prime is 1066645577. The next prime is 1066645633. The reversal of 1066645625 is 5265466601.

It can be written as a sum of positive squares in 5 ways, for example, as 313856656 + 752788969 = 17716^2 + 27437^2 .

It is not a de Polignac number, because 1066645625 - 2⁸ = 1066645369 is a prime.

It is a super-2 number, since 2×1066645625² = 2275465778663281250, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 852692 + ... + 853941.

Almost surely, 2^1066645625 is an apocalyptic number.

It is an amenable number.

1066645625 is a deficient number, since it is larger than the sum of its proper divisors (266235529).

1066645625 is an frugal number, since it uses more digits than its factorization.

1066645625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1706653 (or 1706638 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 41.

The square root of 1066645625 is about 32659.5411021037. The cubic root of 1066645625 is about 1021.7391913024.

The spelling of 1066645625 in words is "one billion, sixty-six million, six hundred forty-five thousand, six hundred twenty-five".