66450478 has 12 divisors (see below), whose sum is σ = 100298520. Its totient is φ = 33018876.

The previous prime is 66450421. The next prime is 66450481. The reversal of 66450478 is 87405466.

It is a self number, because there is not a number n which added to its sum of digits gives 66450478.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 78783 + ... + 79621.

It is an arithmetic number, because the mean of its divisors is an integer number (8358210).

Almost surely, 2^66450478 is an apocalyptic number.

66450478 is a deficient number, since it is larger than the sum of its proper divisors (33848042).

66450478 is an equidigital number, since it uses as much as digits as its factorization.

66450478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1239 (or 1040 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 40.

The square root of 66450478 is about 8151.7162610091. The cubic root of 66450478 is about 405.0413573576.

The spelling of 66450478 in words is "sixty-six million, four hundred fifty thousand, four hundred seventy-eight".