66241020 has 24 divisors (see below), whose sum is σ = 185475024. Its totient is φ = 17664256.

The previous prime is 66241013. The next prime is 66241033. The reversal of 66241020 is 2014266.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 551949 + ... + 552068.

It is an arithmetic number, because the mean of its divisors is an integer number (7728126).

Almost surely, 2^66241020 is an apocalyptic number.

66241020 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66241020 is an abundant number, since it is smaller than the sum of its proper divisors (119234004).

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

66241020 is a wasteful number, since it uses less digits than its factorization.

66241020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1104029 (or 1104027 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 66241020 is about 8138.8586423405. The cubic root of 66241020 is about 404.6153335884.

Adding to 66241020 its reverse (2014266), we get a palindrome (68255286).

The spelling of 66241020 in words is "sixty-six million, two hundred forty-one thousand, twenty".