66210146 has 16 divisors (see below), whose sum is σ = 104666688. Its totient is φ = 31350000.

The previous prime is 66210143. The next prime is 66210149. The reversal of 66210146 is 64101266.

It is a happy number.

66210146 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (66210143) and next prime (66210149).

It is not an unprimeable number, because it can be changed into a prime (66210143) by changing a digit.

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, 2480 + ... + 11771.

It is an arithmetic number, because the mean of its divisors is an integer number (6541668).

Almost surely, 2^66210146 is an apocalyptic number.

66210146 is a deficient number, since it is larger than the sum of its proper divisors (38456542).

66210146 is a wasteful number, since it uses less digits than its factorization.

66210146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14377.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 66210146 is about 8136.9617179879. The cubic root of 66210146 is about 404.5524619966.

The spelling of 66210146 in words is "sixty-six million, two hundred ten thousand, one hundred forty-six".