28851466661 has 2 divisors, whose sum is σ = 28851466662. Its totient is φ = 28851466660.

The previous prime is 28851466613. The next prime is 28851466667. The reversal of 28851466661 is 16666415882.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21846613636 + 7004853025 = 147806^2 + 83695^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28851466661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28851466667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14425733330 + 14425733331.

It is an arithmetic number, because the mean of its divisors is an integer number (14425733331).

Almost surely, 2^28851466661 is an apocalyptic number.

It is an amenable number.

28851466661 is a deficient number, since it is larger than the sum of its proper divisors (1).

28851466661 is an equidigital number, since it uses as much as digits as its factorization.

28851466661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3317760, while the sum is 53.

The spelling of 28851466661 in words is "twenty-eight billion, eight hundred fifty-one million, four hundred sixty-six thousand, six hundred sixty-one".