66936020 has 12 divisors (see below), whose sum is σ = 140565684. Its totient is φ = 26774400.

The previous prime is 66936019. The next prime is 66936041. The reversal of 66936020 is 2063966.

It can be written as a sum of positive squares in 2 ways, for example, as 9721924 + 57214096 = 3118^2 + 7564^2 .

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1673381 + ... + 1673420.

It is an arithmetic number, because the mean of its divisors is an integer number (11713807).

Almost surely, 2^66936020 is an apocalyptic number.

It is an amenable number.

66936020 is an abundant number, since it is smaller than the sum of its proper divisors (73629664).

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

66936020 is a wasteful number, since it uses less digits than its factorization.

66936020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3346810 (or 3346808 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 32.

The square root of 66936020 is about 8181.4436378918. The cubic root of 66936020 is about 406.0254863598.

Adding to 66936020 its reverse (2063966), we get a palindrome (68999986).

The spelling of 66936020 in words is "sixty-six million, nine hundred thirty-six thousand, twenty".