1206365866 has 16 divisors (see below), whose sum is σ = 1940250240. Its totient is φ = 560514240.

The previous prime is 1206365857. The next prime is 1206365911. The reversal of 1206365866 is 6685636021.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 221880 + ... + 227251.

It is an arithmetic number, because the mean of its divisors is an integer number (121265640).

Almost surely, 2^1206365866 is an apocalyptic number.

1206365866 is a deficient number, since it is larger than the sum of its proper divisors (733884374).

1206365866 is a wasteful number, since it uses less digits than its factorization.

1206365866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 449229.

The product of its (nonzero) digits is 311040, while the sum is 43.

The square root of 1206365866 is about 34732.7779770061. Note that the first 3 decimals coincide. The cubic root of 1206365866 is about 1064.5343511598.

The spelling of 1206365866 in words is "one billion, two hundred six million, three hundred sixty-five thousand, eight hundred sixty-six".