665016601 has 8 divisors (see below), whose sum is σ = 674953344. Its totient is φ = 655095840.

The previous prime is 665016593. The next prime is 665016613. The reversal of 665016601 is 106610566.

665016601 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 665016601 - 2³ = 665016593 is a prime.

It is a super-3 number, since 3×665016601³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (665016901) 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, 99501 + ... + 105973.

It is an arithmetic number, because the mean of its divisors is an integer number (84369168).

Almost surely, 2^665016601 is an apocalyptic number.

It is an amenable number.

665016601 is a deficient number, since it is larger than the sum of its proper divisors (9936743).

665016601 is a wasteful number, since it uses less digits than its factorization.

665016601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7991.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 665016601 is about 25787.9157940304. The cubic root of 665016601 is about 872.8591367233.

The spelling of 665016601 in words is "six hundred sixty-five million, sixteen thousand, six hundred one".