27996866618 has 16 divisors (see below), whose sum is σ = 48572879040. Its totient is φ = 11854094496.

The previous prime is 27996866593. The next prime is 27996866621. The reversal of 27996866618 is 81666869972.

It is a super-3 number, since 3×27996866618³ (a number of 32 digits) contains 333 as substring.

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, 12045683 + ... + 12048006.

It is an arithmetic number, because the mean of its divisors is an integer number (3035804940).

Almost surely, 2^27996866618 is an apocalyptic number.

27996866618 is a deficient number, since it is larger than the sum of its proper divisors (20576012422).

27996866618 is a wasteful number, since it uses less digits than its factorization.

27996866618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24093781.

The product of its digits is 94058496, while the sum is 68.

The spelling of 27996866618 in words is "twenty-seven billion, nine hundred ninety-six million, eight hundred sixty-six thousand, six hundred eighteen".