1215667656166 has 8 divisors (see below), whose sum is σ = 1824066220320. Its totient is φ = 607645582728.

The previous prime is 1215667656139. The next prime is 1215667656187. The reversal of 1215667656166 is 6616567665121.

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

It is a super-3 number, since 3×1215667656166³ (a number of 37 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1215667656166.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 94114606 + ... + 94127521.

It is an arithmetic number, because the mean of its divisors is an integer number (228008277540).

Almost surely, 2^{1215667656166} is an apocalyptic number.

1215667656166 is a deficient number, since it is larger than the sum of its proper divisors (608398564154).

1215667656166 is a wasteful number, since it uses less digits than its factorization.

1215667656166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188245358.

The product of its digits is 16329600, while the sum is 58.

The spelling of 1215667656166 in words is "one trillion, two hundred fifteen billion, six hundred sixty-seven million, six hundred fifty-six thousand, one hundred sixty-six".