1066320025 has 12 divisors (see below), whose sum is σ = 1325262400. Its totient is φ = 851104080.

The previous prime is 1066320001. The next prime is 1066320107. The reversal of 1066320025 is 5200236601.

It is not a de Polignac number, because 1066320025 - 2⁵ = 1066319993 is a prime.

It is a super-2 number, since 2×1066320025² = 2274076791432001250, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 37605 + ... + 59554.

Almost surely, 2^1066320025 is an apocalyptic number.

It is an amenable number.

1066320025 is a deficient number, since it is larger than the sum of its proper divisors (258942375).

1066320025 is an equidigital number, since it uses as much as digits as its factorization.

1066320025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97608 (or 97603 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 1066320025 is about 32654.5559608456. Note that the first 3 decimals coincide. The cubic root of 1066320025 is about 1021.6352167085.

Adding to 1066320025 its reverse (5200236601), we get a palindrome (6266556626).

The spelling of 1066320025 in words is "one billion, sixty-six million, three hundred twenty thousand, twenty-five".