1166015551684 has 81 divisors (see below), whose sum is σ = 2127144344871. Its totient is φ = 559261410240.

The previous prime is 1166015551669. The next prime is 1166015551709. The reversal of 1166015551684 is 4861555106611.

The square root of 1166015551684 is 1079822.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 156649724100 + 1009365827584 = 395790^2 + 1004672^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 6982128969 + ... + 6982129135.

Almost surely, 2^{1166015551684} is an apocalyptic number.

1166015551684 is the 1079822-nd square number.

It is an amenable number.

1166015551684 is a deficient number, since it is larger than the sum of its proper divisors (961128793187).

1166015551684 is an frugal number, since it uses more digits than its factorization.

1166015551684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 566 (or 283 counting only the distinct ones).

The product of its (nonzero) digits is 864000, while the sum is 49.

Multiplying 1166015551684 by its sum of digits (49), we get a square (57134762032516 = 7558754²).

The spelling of 1166015551684 in words is "one trillion, one hundred sixty-six billion, fifteen million, five hundred fifty-one thousand, six hundred eighty-four".