190666513 has 4 divisors (see below), whose sum is σ = 195819700. Its totient is φ = 185513328.

The previous prime is 190666507. The next prime is 190666517. The reversal of 190666513 is 315666091.

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

It can be written as a sum of positive squares in 2 ways, for example, as 76860289 + 113806224 = 8767^2 + 10668^2 .

It is a cyclic number.

It is not a de Polignac number, because 190666513 - 2⁹ = 190666001 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37), and also a Moran number because the ratio is a prime number: 5153149 = 190666513 / (1 + 9 + 0 + 6 + 6 + 6 + 5 + 1 + 3).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (190666517) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2576538 + ... + 2576611.

It is an arithmetic number, because the mean of its divisors is an integer number (48954925).

Almost surely, 2^190666513 is an apocalyptic number.

It is an amenable number.

190666513 is a deficient number, since it is larger than the sum of its proper divisors (5153187).

190666513 is an equidigital number, since it uses as much as digits as its factorization.

190666513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5153186.

The product of its (nonzero) digits is 29160, while the sum is 37.

The square root of 190666513 is about 13808.2045538151. The cubic root of 190666513 is about 575.5611540078.

The spelling of 190666513 in words is "one hundred ninety million, six hundred sixty-six thousand, five hundred thirteen".