66141020 has 72 divisors (see below), whose sum is σ = 154531104. Its totient is φ = 23760000.

The previous prime is 66141017. The next prime is 66141029. The reversal of 66141020 is 2014166.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 66140983 and 66141001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66141029) 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, 365330 + ... + 365510.

Almost surely, 2^66141020 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 66141020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77265552).

66141020 is an abundant number, since it is smaller than the sum of its proper divisors (88390084).

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

66141020 is a wasteful number, since it uses less digits than its factorization.

66141020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363 (or 350 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 66141020 is about 8132.7129544820. The cubic root of 66141020 is about 404.4116234039.

Adding to 66141020 its reverse (2014166), we get a palindrome (68155186).

The spelling of 66141020 in words is "sixty-six million, one hundred forty-one thousand, twenty".