1025883666 has 36 divisors (see below), whose sum is σ = 2354783886. Its totient is φ = 321670080.

The previous prime is 1025883659. The next prime is 1025883667. The reversal of 1025883666 is 6663885201.

It can be written as a sum of positive squares in only one way, i.e., 754326225 + 271557441 = 27465^2 + 16479^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1025883667) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 559371 + ... + 561201.

Almost surely, 2^1025883666 is an apocalyptic number.

1025883666 is an abundant number, since it is smaller than the sum of its proper divisors (1328900220).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1025883666 is an equidigital number, since it uses as much as digits as its factorization.

1025883666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3687 (or 1853 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 45.

The square root of 1025883666 is about 32029.4187583852. The cubic root of 1025883666 is about 1008.5545005163.

The spelling of 1025883666 in words is "one billion, twenty-five million, eight hundred eighty-three thousand, six hundred sixty-six".