66969504 has 120 divisors (see below), whose sum is σ = 225152928. Its totient is φ = 19128960.

The previous prime is 66969503. The next prime is 66969541. The reversal of 66969504 is 40596966.

It is a self number, because there is not a number n which added to its sum of digits gives 66969504.

It is not an unprimeable number, because it can be changed into a prime (66969503) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 16299 + ... + 19989.

Almost surely, 2^66969504 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 66969504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (112576464).

66969504 is an abundant number, since it is smaller than the sum of its proper divisors (158183424).

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

66969504 is a wasteful number, since it uses less digits than its factorization.

66969504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3720 (or 3703 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 45.

The square root of 66969504 is about 8183.4897201622. The cubic root of 66969504 is about 406.0931783192.

The spelling of 66969504 in words is "sixty-six million, nine hundred sixty-nine thousand, five hundred four".