66190345 has 8 divisors (see below), whose sum is σ = 85538376. Its totient is φ = 48878976.

The previous prime is 66190337. The next prime is 66190349. The reversal of 66190345 is 54309166.

It can be written as a sum of positive squares in 4 ways, for example, as 190969 + 65999376 = 437^2 + 8124^2 .

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 66190345 - 2³ = 66190337 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 66190345.

It is not an unprimeable number, because it can be changed into a prime (66190349) 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, 509092 + ... + 509221.

It is an arithmetic number, because the mean of its divisors is an integer number (10692297).

Almost surely, 2^66190345 is an apocalyptic number.

66190345 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

66190345 is a deficient number, since it is larger than the sum of its proper divisors (19348031).

66190345 is a wasteful number, since it uses less digits than its factorization.

66190345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1018331.

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 66190345 is about 8135.7448952140. The cubic root of 66190345 is about 404.5121290946.

The spelling of 66190345 in words is "sixty-six million, one hundred ninety thousand, three hundred forty-five".