190066505 has 8 divisors (see below), whose sum is σ = 228155400. Its totient is φ = 152002816.

The previous prime is 190066501. The next prime is 190066507. The reversal of 190066505 is 505660091.

190066505 = 9748² + 9749².

190066505 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 150544 + 189915961 = 388^2 + 13781^2 .

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 190066505 - 2² = 190066501 is a prime.

It is a super-2 number, since 2×190066505² = 72250552645830050, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (190066501) 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, 21251 + ... + 28839.

It is an arithmetic number, because the mean of its divisors is an integer number (28519425).

Almost surely, 2^190066505 is an apocalyptic number.

190066505 is the 9749-th centered square number.

It is an amenable number.

190066505 is a deficient number, since it is larger than the sum of its proper divisors (38088895).

190066505 is an equidigital number, since it uses as much as digits as its factorization.

190066505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12603.

The product of its (nonzero) digits is 8100, while the sum is 32.

The square root of 190066505 is about 13786.4609309278. The cubic root of 190066505 is about 574.9567755788.

The spelling of 190066505 in words is "one hundred ninety million, sixty-six thousand, five hundred five".