66394106 has 4 divisors (see below), whose sum is σ = 99591162. Its totient is φ = 33197052.

The previous prime is 66394103. The next prime is 66394117. The reversal of 66394106 is 60149366.

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., 57896881 + 8497225 = 7609^2 + 2915^2 .

It is not an unprimeable number, because it can be changed into a prime (66394103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16598525 + ... + 16598528.

Almost surely, 2^66394106 is an apocalyptic number.

66394106 is a deficient number, since it is larger than the sum of its proper divisors (33197056).

66394106 is a wasteful number, since it uses less digits than its factorization.

66394106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33197055.

The product of its (nonzero) digits is 23328, while the sum is 35.

The square root of 66394106 is about 8148.2578506083. The cubic root of 66394106 is about 404.9267885751.

The spelling of 66394106 in words is "sixty-six million, three hundred ninety-four thousand, one hundred six".