66830544 has 120 divisors (see below), whose sum is σ = 210772224. Its totient is φ = 19584000.

The previous prime is 66830527. The next prime is 66830549. The reversal of 66830544 is 44503866.

It is a super-2 number, since 2×66830544² = 8932643222671872, which contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 66830499 and 66830508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66830549) 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, 48424 + ... + 49784.

Almost surely, 2^66830544 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 66830544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (105386112).

66830544 is an abundant number, since it is smaller than the sum of its proper divisors (143941680).

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

66830544 is a wasteful number, since it uses less digits than its factorization.

66830544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1417 (or 1408 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The square root of 66830544 is about 8174.9950458701. The cubic root of 66830544 is about 405.8121061869.

The spelling of 66830544 in words is "sixty-six million, eight hundred thirty thousand, five hundred forty-four".