36669621 has 32 divisors (see below), whose sum is σ = 52899840. Its totient is φ = 22550400.

The previous prime is 36669593. The next prime is 36669631. The reversal of 36669621 is 12696663.

It is a happy number.

36669621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-36669621 is a prime.

It is a super-2 number, since 2×36669621² = 2689322208567282, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 36669621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36669631) 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 31 ways as a sum of consecutive naturals, for example, 224886 + ... + 225048.

It is an arithmetic number, because the mean of its divisors is an integer number (1653120).

Almost surely, 2^36669621 is an apocalyptic number.

36669621 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

36669621 is a deficient number, since it is larger than the sum of its proper divisors (16230219).

36669621 is a wasteful number, since it uses less digits than its factorization.

36669621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297.

The product of its digits is 69984, while the sum is 39.

The square root of 36669621 is about 6055.5446493276. The cubic root of 36669621 is about 332.2274201480.

The spelling of 36669621 in words is "thirty-six million, six hundred sixty-nine thousand, six hundred twenty-one".