66251382 has 16 divisors (see below), whose sum is σ = 133055472. Its totient is φ = 21991680.

The previous prime is 66251377. The next prime is 66251387. The reversal of 66251382 is 28315266.

It is an interprime number because it is at equal distance from previous prime (66251377) and next prime (66251387).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66251387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21463 + ... + 24354.

It is an arithmetic number, because the mean of its divisors is an integer number (8315967).

Almost surely, 2^66251382 is an apocalyptic number.

66251382 is an abundant number, since it is smaller than the sum of its proper divisors (66804090).

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

66251382 is a wasteful number, since it uses less digits than its factorization.

66251382 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46063.

The product of its digits is 17280, while the sum is 33.

The square root of 66251382 is about 8139.4951931923. The cubic root of 66251382 is about 404.6364303121.

The spelling of 66251382 in words is "sixty-six million, two hundred fifty-one thousand, three hundred eighty-two".