660198519 has 60 divisors (see below), whose sum is σ = 1077116832. Its totient is φ = 401414400.

The previous prime is 660198499. The next prime is 660198521. The reversal of 660198519 is 915891066.

It is not a de Polignac number, because 660198519 - 2⁷ = 660198391 is a prime.

It is a super-2 number, since 2×660198519² = 871724168979586722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660198589) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 6536569 + ... + 6536669.

Almost surely, 2^660198519 is an apocalyptic number.

660198519 is a deficient number, since it is larger than the sum of its proper divisors (416918313).

660198519 is a wasteful number, since it uses less digits than its factorization.

660198519 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278 (or 168 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 45.

The square root of 660198519 is about 25694.3285376365. The cubic root of 660198519 is about 870.7460544616.

The spelling of 660198519 in words is "six hundred sixty million, one hundred ninety-eight thousand, five hundred nineteen".