66450394 has 16 divisors (see below), whose sum is σ = 102244032. Its totient is φ = 32372928.

The previous prime is 66450389. The next prime is 66450401. The reversal of 66450394 is 49305466.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50347 + ... + 51649.

It is an arithmetic number, because the mean of its divisors is an integer number (6390252).

Almost surely, 2^66450394 is an apocalyptic number.

66450394 is a deficient number, since it is larger than the sum of its proper divisors (35793638).

66450394 is a wasteful number, since it uses less digits than its factorization.

66450394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1941.

The product of its (nonzero) digits is 77760, while the sum is 37.

The square root of 66450394 is about 8151.7111087182. The cubic root of 66450394 is about 405.0411866867.

The spelling of 66450394 in words is "sixty-six million, four hundred fifty thousand, three hundred ninety-four".