66919356 has 72 divisors (see below), whose sum is σ = 200010720. Its totient is φ = 18458496.

The previous prime is 66919343. The next prime is 66919381. The reversal of 66919356 is 65391966.

It is a hoax number, since the sum of its digits (45) 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 polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2730 + ... + 11886.

Almost surely, 2^66919356 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66919356, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100005360).

66919356 is an abundant number, since it is smaller than the sum of its proper divisors (133091364).

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

66919356 is a wasteful number, since it uses less digits than its factorization.

66919356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9203 (or 9198 counting only the distinct ones).

The product of its digits is 262440, while the sum is 45.

The square root of 66919356 is about 8180.4251723245. The cubic root of 66919356 is about 405.9917896533.

The spelling of 66919356 in words is "sixty-six million, nine hundred nineteen thousand, three hundred fifty-six".