66574080 has 108 divisors (see below), whose sum is σ = 230379240. Its totient is φ = 17750016.

The previous prime is 66574061. The next prime is 66574093. The reversal of 66574080 is 8047566.

It is a happy number.

66574080 is a `hidden beast` number, since 6 + 6 + 574 + 0 + 80 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent 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, 8631 + ... + 14409.

Almost surely, 2^66574080 is an apocalyptic number.

66574080 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66574080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (115189620).

66574080 is an abundant number, since it is smaller than the sum of its proper divisors (163805160).

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

66574080 is a wasteful number, since it uses less digits than its factorization.

66574080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5806 (or 5789 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 66574080 is about 8159.2940871132. The cubic root of 66574080 is about 405.2923358042.

The spelling of 66574080 in words is "sixty-six million, five hundred seventy-four thousand, eighty".