660695383 has 4 divisors (see below), whose sum is σ = 661029880. Its totient is φ = 660360888.

The previous prime is 660695363. The next prime is 660695389. The reversal of 660695383 is 383596066.

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

It is a cyclic number.

It is not a de Polignac number, because 660695383 - 2⁵ = 660695351 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660695389) 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, 164268 + ... + 168241.

It is an arithmetic number, because the mean of its divisors is an integer number (165257470).

Almost surely, 2^660695383 is an apocalyptic number.

660695383 is a deficient number, since it is larger than the sum of its proper divisors (334497).

660695383 is a wasteful number, since it uses less digits than its factorization.

660695383 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334496.

The product of its (nonzero) digits is 699840, while the sum is 46.

The square root of 660695383 is about 25703.9954676311. The cubic root of 660695383 is about 870.9644402275.

The spelling of 660695383 in words is "six hundred sixty million, six hundred ninety-five thousand, three hundred eighty-three".