66893256 has 128 divisors (see below), whose sum is σ = 196560000. Its totient is φ = 21047040.

The previous prime is 66893207. The next prime is 66893273. The reversal of 66893256 is 65239866.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 369486 + ... + 369666.

It is an arithmetic number, because the mean of its divisors is an integer number (1535625).

Almost surely, 2^66893256 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 66893256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98280000).

66893256 is an abundant number, since it is smaller than the sum of its proper divisors (129666744).

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

66893256 is a wasteful number, since it uses less digits than its factorization.

66893256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284 (or 274 counting only the distinct ones).

The product of its digits is 466560, while the sum is 45.

The square root of 66893256 is about 8178.8297451408. The cubic root of 66893256 is about 405.9390009225.

The spelling of 66893256 in words is "sixty-six million, eight hundred ninety-three thousand, two hundred fifty-six".