66841020 has 36 divisors (see below), whose sum is σ = 202751640. Its totient is φ = 17824224.

The previous prime is 66841007. The next prime is 66841037. The reversal of 66841020 is 2014866.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 185490 + ... + 185849.

It is an arithmetic number, because the mean of its divisors is an integer number (5631990).

Almost surely, 2^66841020 is an apocalyptic number.

66841020 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66841020 is an abundant number, since it is smaller than the sum of its proper divisors (135910620).

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

66841020 is a wasteful number, since it uses less digits than its factorization.

66841020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 371354 (or 371349 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 66841020 is about 8175.6357550957. The cubic root of 66841020 is about 405.8333093935.

Adding to 66841020 its reverse (2014866), we get a palindrome (68855886).

The spelling of 66841020 in words is "sixty-six million, eight hundred forty-one thousand, twenty".