190666351 has 4 divisors (see below), whose sum is σ = 190733872. Its totient is φ = 190598832.

The previous prime is 190666331. The next prime is 190666363. The reversal of 190666351 is 153666091.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 153666091 = 19 ⋅8087689.

It is a cyclic number.

It is not a de Polignac number, because 190666351 - 2⁵ = 190666319 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 190666351.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (190666331) 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, 29331 + ... + 35236.

It is an arithmetic number, because the mean of its divisors is an integer number (47683468).

Almost surely, 2^190666351 is an apocalyptic number.

190666351 is a deficient number, since it is larger than the sum of its proper divisors (67521).

190666351 is an equidigital number, since it uses as much as digits as its factorization.

190666351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67520.

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

The square root of 190666351 is about 13808.1986877362. The cubic root of 190666351 is about 575.5609909990.

The spelling of 190666351 in words is "one hundred ninety million, six hundred sixty-six thousand, three hundred fifty-one".