66146420 has 24 divisors (see below), whose sum is σ = 140983584. Its totient is φ = 26063136.

The previous prime is 66146401. The next prime is 66146441. The reversal of 66146420 is 2464166.

66146420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23342 + ... + 26021.

It is an arithmetic number, because the mean of its divisors is an integer number (5874316).

Almost surely, 2^66146420 is an apocalyptic number.

It is an amenable number.

66146420 is an abundant number, since it is smaller than the sum of its proper divisors (74837164).

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

66146420 is a wasteful number, since it uses less digits than its factorization.

66146420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49439 (or 49437 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 66146420 is about 8133.0449402422. The cubic root of 66146420 is about 404.4226289964.

It can be divided in two parts, 66146 and 420, that added together give a palindrome (66566).

The spelling of 66146420 in words is "sixty-six million, one hundred forty-six thousand, four hundred twenty".