2666286985 has 8 divisors (see below), whose sum is σ = 3201485256. Its totient is φ = 2131735680.

The previous prime is 2666286979. The next prime is 2666286991. The reversal of 2666286985 is 5896826662.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2666286979) and next prime (2666286991).

It can be written as a sum of positive squares in 4 ways, for example, as 355850496 + 2310436489 = 18864^2 + 48067^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-2666286985 is a prime.

It is a Duffinian number.

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, 152626 + ... + 169195.

It is an arithmetic number, because the mean of its divisors is an integer number (400185657).

Almost surely, 2^2666286985 is an apocalyptic number.

It is an amenable number.

2666286985 is a deficient number, since it is larger than the sum of its proper divisors (535198271).

2666286985 is a wasteful number, since it uses less digits than its factorization.

2666286985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323483.

The product of its digits is 14929920, while the sum is 58.

The square root of 2666286985 is about 51636.1015666365. The cubic root of 2666286985 is about 1386.6567314364.

The spelling of 2666286985 in words is "two billion, six hundred sixty-six million, two hundred eighty-six thousand, nine hundred eighty-five".