36669221 has 16 divisors (see below), whose sum is σ = 41290560. Its totient is φ = 32359680.

The previous prime is 36669197. The next prime is 36669233. The reversal of 36669221 is 12296663.

36669221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 36669221 - 2²² = 32474917 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36669251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34031 + ... + 35091.

It is an arithmetic number, because the mean of its divisors is an integer number (2580660).

Almost surely, 2^36669221 is an apocalyptic number.

It is an amenable number.

36669221 is a deficient number, since it is larger than the sum of its proper divisors (4621339).

36669221 is a wasteful number, since it uses less digits than its factorization.

36669221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1204.

The product of its digits is 23328, while the sum is 35.

The square root of 36669221 is about 6055.5116216551. The cubic root of 36669221 is about 332.2262121413.

The spelling of 36669221 in words is "thirty-six million, six hundred sixty-nine thousand, two hundred twenty-one".