6660099 has 6 divisors (see below), whose sum is σ = 9620156. Its totient is φ = 4440060.

The previous prime is 6660091. The next prime is 6660103. The reversal of 6660099 is 9900666.

It is not a de Polignac number, because 6660099 - 2³ = 6660091 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a zygodrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (6660091) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 369997 + ... + 370014.

Almost surely, 2^6660099 is an apocalyptic number.

6660099 is a deficient number, since it is larger than the sum of its proper divisors (2960057).

6660099 is a wasteful number, since it uses less digits than its factorization.

6660099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 740017 (or 740014 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 36.

The square root of 6660099 is about 2580.7167609019. The cubic root of 6660099 is about 188.1453813601.

The spelling of 6660099 in words is "six million, six hundred sixty thousand, ninety-nine".