866164265 has 16 divisors (see below), whose sum is σ = 1092324288. Its totient is φ = 658518336.

The previous prime is 866164259. The next prime is 866164283. The reversal of 866164265 is 562461668.

It is a cyclic number.

It is not a de Polignac number, because 866164265 - 2¹⁴ = 866147881 is a prime.

It is a Duffinian 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, 46487 + ... + 62396.

It is an arithmetic number, because the mean of its divisors is an integer number (68270268).

Almost surely, 2^866164265 is an apocalyptic number.

It is an amenable number.

866164265 is a deficient number, since it is larger than the sum of its proper divisors (226160023).

866164265 is a wasteful number, since it uses less digits than its factorization.

866164265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108968.

The product of its digits is 414720, while the sum is 44.

The square root of 866164265 is about 29430.6687827511. The cubic root of 866164265 is about 953.2352357889.

The spelling of 866164265 in words is "eight hundred sixty-six million, one hundred sixty-four thousand, two hundred sixty-five".