66141660 has 96 divisors (see below), whose sum is σ = 209986560. Its totient is φ = 15420672.

The previous prime is 66141659. The next prime is 66141667. The reversal of 66141660 is 6614166.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66141667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12589 + ... + 17051.

It is an arithmetic number, because the mean of its divisors is an integer number (2187360).

Almost surely, 2^66141660 is an apocalyptic number.

66141660 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 66141660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104993280).

66141660 is an abundant number, since it is smaller than the sum of its proper divisors (143844900).

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

66141660 is a wasteful number, since it uses less digits than its factorization.

66141660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4507 (or 4505 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 66141660 is about 8132.7523016504. The cubic root of 66141660 is about 404.4129278017.

The spelling of 66141660 in words is "sixty-six million, one hundred forty-one thousand, six hundred sixty".