1188307247666 has 16 divisors (see below), whose sum is σ = 2222288879040. Its totient is φ = 462976849680.

The previous prime is 1188307247651. The next prime is 1188307247671. The reversal of 1188307247666 is 6667427038811.

It is a happy number.

It is a super-2 number, since 2×1188307247666² (a number of 25 digits) contains 22 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, 3858140261 + ... + 3858140568.

It is an arithmetic number, because the mean of its divisors is an integer number (138893054940).

Almost surely, 2^{1188307247666} is an apocalyptic number.

1188307247666 is a deficient number, since it is larger than the sum of its proper divisors (1033981631374).

1188307247666 is a wasteful number, since it uses less digits than its factorization.

1188307247666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7716280849.

The product of its (nonzero) digits is 16257024, while the sum is 59.

The spelling of 1188307247666 in words is "one trillion, one hundred eighty-eight billion, three hundred seven million, two hundred forty-seven thousand, six hundred sixty-six".