7663113666 has 48 divisors (see below), whose sum is σ = 17893859256. Its totient is φ = 2356132608.

The previous prime is 7663113659. The next prime is 7663113673. The reversal of 7663113666 is 6663113667.

It is an interprime number because it is at equal distance from previous prime (7663113659) and next prime (7663113673).

It can be written as a sum of positive squares in 4 ways, for example, as 5299112025 + 2364001641 = 72795^2 + 48621^2 .

It is a super-2 number, since 2×7663113666² (a number of 21 digits) contains 22 as substring.

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, 323896 + ... + 346748.

Almost surely, 2^7663113666 is an apocalyptic number.

7663113666 is an abundant number, since it is smaller than the sum of its proper divisors (10230745590).

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

7663113666 is a wasteful number, since it uses less digits than its factorization.

7663113666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24307 (or 24304 counting only the distinct ones).

The product of its digits is 489888, while the sum is 45.

The square root of 7663113666 is about 87539.2121623219. The cubic root of 7663113666 is about 1971.5225816678.

Subtracting from 7663113666 its reverse (6663113667), we obtain a palindrome (999999999).

The spelling of 7663113666 in words is "seven billion, six hundred sixty-three million, one hundred thirteen thousand, six hundred sixty-six".