66830445 has 48 divisors (see below), whose sum is σ = 128044800. Its totient is φ = 31973760.

The previous prime is 66830443. The next prime is 66830447. The reversal of 66830445 is 54403866.

It is an interprime number because it is at equal distance from previous prime (66830443) and next prime (66830447).

It is not a de Polignac number, because 66830445 - 2¹ = 66830443 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66830443) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 38251 + ... + 39959.

It is an arithmetic number, because the mean of its divisors is an integer number (2667600).

Almost surely, 2^66830445 is an apocalyptic number.

It is an amenable number.

66830445 is a deficient number, since it is larger than the sum of its proper divisors (61214355).

66830445 is a wasteful number, since it uses less digits than its factorization.

66830445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1810 (or 1807 counting only the distinct ones).

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

The square root of 66830445 is about 8174.9889908183. The cubic root of 66830445 is about 405.8119058024.

It can be divided in two parts, 668 and 30445, that added together give a palindrome (31113).

The spelling of 66830445 in words is "sixty-six million, eight hundred thirty thousand, four hundred forty-five".