6660897 has 8 divisors (see below), whose sum is σ = 8897280. Its totient is φ = 4432560.

The previous prime is 6660859. The next prime is 6660911. The reversal of 6660897 is 7980666.

It is a happy number.

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

It is not a de Polignac number, because 6660897 - 2¹⁸ = 6398753 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6660197) 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, 304 + ... + 3662.

It is an arithmetic number, because the mean of its divisors is an integer number (1112160).

Almost surely, 2^6660897 is an apocalyptic number.

It is an amenable number.

6660897 is a deficient number, since it is larger than the sum of its proper divisors (2236383).

6660897 is a wasteful number, since it uses less digits than its factorization.

6660897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4023.

The product of its (nonzero) digits is 108864, while the sum is 42.

The square root of 6660897 is about 2580.8713644814. The cubic root of 6660897 is about 188.1528954635.

It can be divided in two parts, 6660 and 897, that added together give a palindrome (7557).

The spelling of 6660897 in words is "six million, six hundred sixty thousand, eight hundred ninety-seven".