1166001655 has 16 divisors (see below), whose sum is σ = 1722095424. Its totient is φ = 738040320.

The previous prime is 1166001623. The next prime is 1166001677. The reversal of 1166001655 is 5561006611.

It is not a de Polignac number, because 1166001655 - 2⁵ = 1166001623 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1280866 + ... + 1281775.

It is an arithmetic number, because the mean of its divisors is an integer number (107630964).

Almost surely, 2^1166001655 is an apocalyptic number.

1166001655 is a deficient number, since it is larger than the sum of its proper divisors (556093769).

1166001655 is a wasteful number, since it uses less digits than its factorization.

1166001655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2562666.

The product of its (nonzero) digits is 5400, while the sum is 31.

The square root of 1166001655 is about 34146.7663915633. The cubic root of 1166001655 is about 1052.5265400296.

The spelling of 1166001655 in words is "one billion, one hundred sixty-six million, one thousand, six hundred fifty-five".