66880926 has 48 divisors (see below), whose sum is σ = 167731200. Its totient is φ = 18864144.

The previous prime is 66880889. The next prime is 66880927. The reversal of 66880926 is 62908866.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66880927) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6595 + ... + 13313.

It is an arithmetic number, because the mean of its divisors is an integer number (3494400).

Almost surely, 2^66880926 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66880926, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83865600).

66880926 is an abundant number, since it is smaller than the sum of its proper divisors (100850274).

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

66880926 is a wasteful number, since it uses less digits than its factorization.

66880926 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6813 (or 6810 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The square root of 66880926 is about 8178.0759350840. The cubic root of 66880926 is about 405.9140580222.

The spelling of 66880926 in words is "sixty-six million, eight hundred eighty thousand, nine hundred twenty-six".