66194074 has 4 divisors (see below), whose sum is σ = 99291114. Its totient is φ = 33097036.

The previous prime is 66194059. The next prime is 66194099. The reversal of 66194074 is 47049166.

66194074 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in only one way, i.e., 54243225 + 11950849 = 7365^2 + 3457^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 16548517 + ... + 16548520.

Almost surely, 2^66194074 is an apocalyptic number.

66194074 is a deficient number, since it is larger than the sum of its proper divisors (33097040).

66194074 is a wasteful number, since it uses less digits than its factorization.

66194074 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33097039.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 66194074 is about 8135.9740658387. The cubic root of 66194074 is about 404.5197253556.

The spelling of 66194074 in words is "sixty-six million, one hundred ninety-four thousand, seventy-four".