66907296 has 120 divisors (see below), whose sum is σ = 199783584. Its totient is φ = 21962880.

The previous prime is 66907279. The next prime is 66907327. The reversal of 66907296 is 69270966.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 214981 + ... + 215291.

Almost surely, 2^66907296 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 66907296, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99891792).

66907296 is an abundant number, since it is smaller than the sum of its proper divisors (132876288).

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

66907296 is a wasteful number, since it uses less digits than its factorization.

66907296 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416 (or 399 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 45.

The square root of 66907296 is about 8179.6880136103. The cubic root of 66907296 is about 405.9673993253.

The spelling of 66907296 in words is "sixty-six million, nine hundred seven thousand, two hundred ninety-six".