660808101 has 8 divisors (see below), whose sum is σ = 919385280. Its totient is φ = 421384832.

The previous prime is 660808097. The next prime is 660808151. The reversal of 660808101 is 101808066.

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 660808101 - 2² = 660808097 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660808151) 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, 4788396 + ... + 4788533.

It is an arithmetic number, because the mean of its divisors is an integer number (114923160).

Almost surely, 2^660808101 is an apocalyptic number.

It is an amenable number.

660808101 is a deficient number, since it is larger than the sum of its proper divisors (258577179).

660808101 is a wasteful number, since it uses less digits than its factorization.

660808101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9576955.

The product of its (nonzero) digits is 2304, while the sum is 30.

The square root of 660808101 is about 25706.1879904431. The cubic root of 660808101 is about 871.0139677354.

The spelling of 660808101 in words is "six hundred sixty million, eight hundred eight thousand, one hundred one".