66394107 has 64 divisors (see below), whose sum is σ = 111767040. Its totient is φ = 38683008.

The previous prime is 66394103. The next prime is 66394117. The reversal of 66394107 is 70149366.

66394107 is a `hidden beast` number, since 6 + 639 + 4 + 10 + 7 = 666.

It is not a de Polignac number, because 66394107 - 2² = 66394103 is a prime.

It is a congruent number.

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

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 63 ways as a sum of consecutive naturals, for example, 799888 + ... + 799970.

It is an arithmetic number, because the mean of its divisors is an integer number (1746360).

Almost surely, 2^66394107 is an apocalyptic number.

66394107 is a deficient number, since it is larger than the sum of its proper divisors (45372933).

66394107 is a wasteful number, since it uses less digits than its factorization.

66394107 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201 (or 195 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 66394107 is about 8148.2579119711. The cubic root of 66394107 is about 404.9267906081.

It can be divided in two parts, 66 and 394107, that multiplied together give a palindrome (26011062).

The spelling of 66394107 in words is "sixty-six million, three hundred ninety-four thousand, one hundred seven".