665601613238 has 8 divisors (see below), whose sum is σ = 1001592204888. Its totient is φ = 331737544944.

The previous prime is 665601613223. The next prime is 665601613253. The reversal of 665601613238 is 832316106566.

It is an interprime number because it is at equal distance from previous prime (665601613223) and next prime (665601613253).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 665601613192 and 665601613201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 531630056 + ... + 531631307.

It is an arithmetic number, because the mean of its divisors is an integer number (125199025611).

Almost surely, 2^665601613238 is an apocalyptic number.

665601613238 is a deficient number, since it is larger than the sum of its proper divisors (335990591650).

665601613238 is a wasteful number, since it uses less digits than its factorization.

665601613238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1063261678.

The product of its (nonzero) digits is 933120, while the sum is 47.

The spelling of 665601613238 in words is "six hundred sixty-five billion, six hundred one million, six hundred thirteen thousand, two hundred thirty-eight".