866081345 has 16 divisors (see below), whose sum is σ = 1065173760. Its totient is φ = 675826944.

The previous prime is 866081309. The next prime is 866081357. The reversal of 866081345 is 543180668.

It is a cyclic number.

It is not a de Polignac number, because 866081345 - 2¹⁰ = 866080321 is a prime.

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, 19577 + ... + 45993.

It is an arithmetic number, because the mean of its divisors is an integer number (66573360).

Almost surely, 2^866081345 is an apocalyptic number.

It is an amenable number.

866081345 is a deficient number, since it is larger than the sum of its proper divisors (199092415).

866081345 is a wasteful number, since it uses less digits than its factorization.

866081345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26584.

The product of its (nonzero) digits is 138240, while the sum is 41.

The square root of 866081345 is about 29429.2600144822. The cubic root of 866081345 is about 953.2048163133.

The spelling of 866081345 in words is "eight hundred sixty-six million, eighty-one thousand, three hundred forty-five".