66446151 has 4 divisors (see below), whose sum is σ = 88594872. Its totient is φ = 44297432.

The previous prime is 66446143. The next prime is 66446167. The reversal of 66446151 is 15164466.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66446151 - 2³ = 66446143 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66446651) 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 3 ways as a sum of consecutive naturals, for example, 11074356 + ... + 11074361.

It is an arithmetic number, because the mean of its divisors is an integer number (22148718).

Almost surely, 2^66446151 is an apocalyptic number.

66446151 is a deficient number, since it is larger than the sum of its proper divisors (22148721).

66446151 is a wasteful number, since it uses less digits than its factorization.

66446151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22148720.

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

The square root of 66446151 is about 8151.4508524557. The cubic root of 66446151 is about 405.0325655874.

The spelling of 66446151 in words is "sixty-six million, four hundred forty-six thousand, one hundred fifty-one".