1086590661 has 32 divisors (see below), whose sum is σ = 1580167680. Its totient is φ = 660187584.

The previous prime is 1086590653. The next prime is 1086590663. The reversal of 1086590661 is 1660956801.

It is a happy number.

It is not a de Polignac number, because 1086590661 - 2³ = 1086590653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1086590663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1230126 + ... + 1231008.

It is an arithmetic number, because the mean of its divisors is an integer number (49380240).

Almost surely, 2^1086590661 is an apocalyptic number.

It is an amenable number.

1086590661 is a deficient number, since it is larger than the sum of its proper divisors (493577019).

1086590661 is a wasteful number, since it uses less digits than its factorization.

1086590661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1265.

The product of its (nonzero) digits is 77760, while the sum is 42.

The square root of 1086590661 is about 32963.4746499819. The cubic root of 1086590661 is about 1028.0683503258.

The spelling of 1086590661 in words is "one billion, eighty-six million, five hundred ninety thousand, six hundred sixty-one".