1025500066 has 16 divisors (see below), whose sum is σ = 1595477880. Its totient is φ = 493948800.

The previous prime is 1025500051. The next prime is 1025500079. The reversal of 1025500066 is 6600055201.

It can be written as a sum of positive squares in 4 ways, for example, as 1012576041 + 12924025 = 31821^2 + 3595^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1025500066.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61131 + ... + 76078.

Almost surely, 2^1025500066 is an apocalyptic number.

1025500066 is a deficient number, since it is larger than the sum of its proper divisors (569977814).

1025500066 is a wasteful number, since it uses less digits than its factorization.

1025500066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137349.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 1025500066 is about 32023.4299537073. The cubic root of 1025500066 is about 1008.4287780943.

Adding to 1025500066 its reverse (6600055201), we get a palindrome (7625555267).

The spelling of 1025500066 in words is "one billion, twenty-five million, five hundred thousand, sixty-six".