6660807 has 8 divisors (see below), whose sum is σ = 9187440. Its totient is φ = 4287360.

The previous prime is 6660799. The next prime is 6660809. The reversal of 6660807 is 7080666.

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

It is not a de Polignac number, because 6660807 - 2³ = 6660799 is a prime.

It is an Ulam number.

6660807 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6660809) 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, 38194 + ... + 38367.

It is an arithmetic number, because the mean of its divisors is an integer number (1148430).

Almost surely, 2^6660807 is an apocalyptic number.

6660807 is a deficient number, since it is larger than the sum of its proper divisors (2526633).

6660807 is a wasteful number, since it uses less digits than its factorization.

6660807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76593.

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 6660807 is about 2580.8539284508. The cubic root of 6660807 is about 188.1520480382.

The spelling of 6660807 in words is "six million, six hundred sixty thousand, eight hundred seven".