66370193 has 8 divisors (see below), whose sum is σ = 72174312. Its totient is φ = 60777216.

The previous prime is 66370153. The next prime is 66370201. The reversal of 66370193 is 39107366.

It can be written as a sum of positive squares in 4 ways, for example, as 35378704 + 30991489 = 5948^2 + 5567^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66370193 - 2⁸ = 66369937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66370153) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52130 + ... + 53387.

It is an arithmetic number, because the mean of its divisors is an integer number (9021789).

Almost surely, 2^66370193 is an apocalyptic number.

It is an amenable number.

66370193 is a deficient number, since it is larger than the sum of its proper divisors (5804119).

66370193 is a wasteful number, since it uses less digits than its factorization.

66370193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105571.

The product of its (nonzero) digits is 20412, while the sum is 35.

The square root of 66370193 is about 8146.7903495794. The cubic root of 66370193 is about 404.8781689128.

The spelling of 66370193 in words is "sixty-six million, three hundred seventy thousand, one hundred ninety-three".