1066636625 has 16 divisors (see below), whose sum is σ = 1333030608. Its totient is φ = 852112000.

The previous prime is 1066636601. The next prime is 1066636631. The reversal of 1066636625 is 5266366601.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 969948736 + 96687889 = 31144^2 + 9833^2 .

It is not a de Polignac number, because 1066636625 - 2⁸ = 1066636369 is a prime.

It is a super-2 number, since 2×1066636625² = 2275427379582781250, 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 (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 89519 + ... + 100731.

It is an arithmetic number, because the mean of its divisors is an integer number (83314413).

Almost surely, 2^1066636625 is an apocalyptic number.

It is an amenable number.

1066636625 is a deficient number, since it is larger than the sum of its proper divisors (266393983).

1066636625 is an equidigital number, since it uses as much as digits as its factorization.

1066636625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11989 (or 11979 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 41.

The square root of 1066636625 is about 32659.4033166560. The cubic root of 1066636625 is about 1021.7363175961.

The spelling of 1066636625 in words is "one billion, sixty-six million, six hundred thirty-six thousand, six hundred twenty-five".