66969396 has 48 divisors (see below), whose sum is σ = 186984000. Its totient is φ = 20605536.

The previous prime is 66969389. The next prime is 66969421. The reversal of 66969396 is 69396966.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 22446 + ... + 25253.

It is an arithmetic number, because the mean of its divisors is an integer number (3895500).

Almost surely, 2^66969396 is an apocalyptic number.

It is an amenable number.

66969396 is an abundant number, since it is smaller than the sum of its proper divisors (120014604).

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

66969396 is a wasteful number, since it uses less digits than its factorization.

66969396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47725 (or 47717 counting only the distinct ones).

The product of its digits is 2834352, while the sum is 54.

The square root of 66969396 is about 8183.4831215076. The cubic root of 66969396 is about 406.0929600204.

The spelling of 66969396 in words is "sixty-six million, nine hundred sixty-nine thousand, three hundred ninety-six".