366999666 has 32 divisors (see below), whose sum is σ = 815842368. Its totient is φ = 109112640.

The previous prime is 366999631. The next prime is 366999667. The reversal of 366999666 is 666999663.

It is a super-2 number, since 2×366999666² = 269377509688223112, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (366999667) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 48961 + ... + 55956.

It is an arithmetic number, because the mean of its divisors is an integer number (25495074).

Almost surely, 2^366999666 is an apocalyptic number.

366999666 is an abundant number, since it is smaller than the sum of its proper divisors (448842702).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

366999666 is a wasteful number, since it uses less digits than its factorization.

366999666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104986.

The product of its digits is 17006112, while the sum is 60.

The square root of 366999666 is about 19157.2353433370. The cubic root of 366999666 is about 715.9596652892.

The spelling of 366999666 in words is "three hundred sixty-six million, nine hundred ninety-nine thousand, six hundred sixty-six".