28662661025 has 24 divisors (see below), whose sum is σ = 36255893760. Its totient is φ = 22470402240.

The previous prime is 28662660991. The next prime is 28662661031. The reversal of 28662661025 is 52016626682.

It is not a de Polignac number, because 28662661025 - 2¹⁰ = 28662660001 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1125584 + ... + 1150766.

It is an arithmetic number, because the mean of its divisors is an integer number (1510662240).

Almost surely, 2^28662661025 is an apocalyptic number.

28662661025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28662661025 is a deficient number, since it is larger than the sum of its proper divisors (7593232735).

28662661025 is a wasteful number, since it uses less digits than its factorization.

28662661025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26105 (or 26100 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 44.

The spelling of 28662661025 in words is "twenty-eight billion, six hundred sixty-two million, six hundred sixty-one thousand, twenty-five".