66969792 has 84 divisors (see below), whose sum is σ = 193167000. Its totient is φ = 22182912.

The previous prime is 66969761. The next prime is 66969811. The reversal of 66969792 is 29796966.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 133959 + ... + 134457.

Almost surely, 2^66969792 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 66969792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96583500).

66969792 is an abundant number, since it is smaller than the sum of its proper divisors (126197208).

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

66969792 is a wasteful number, since it uses less digits than its factorization.

66969792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 750 (or 737 counting only the distinct ones).

The product of its digits is 2204496, while the sum is 54.

The square root of 66969792 is about 8183.5073165483. The cubic root of 66969792 is about 406.0937604482.

The spelling of 66969792 in words is "sixty-six million, nine hundred sixty-nine thousand, seven hundred ninety-two".