861670611 has 12 divisors (see below), whose sum is σ = 1261686088. Its totient is φ = 566577504.

The previous prime is 861670609. The next prime is 861670627. The reversal of 861670611 is 116076168.

861670611 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 861670611 - 2¹ = 861670609 is a prime.

It is a super-2 number, since 2×861670611² = 1484952483722226642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (861670651) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 655105 + ... + 656418.

Almost surely, 2^861670611 is an apocalyptic number.

861670611 is a deficient number, since it is larger than the sum of its proper divisors (400015477).

861670611 is a wasteful number, since it uses less digits than its factorization.

861670611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1311602 (or 1311599 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 861670611 is about 29354.2264588934. The cubic root of 861670611 is about 951.5839176216.

The spelling of 861670611 in words is "eight hundred sixty-one million, six hundred seventy thousand, six hundred eleven".