6640117366 has 4 divisors (see below), whose sum is σ = 9960176052. Its totient is φ = 3320058682.

The previous prime is 6640117357. The next prime is 6640117369. The reversal of 6640117366 is 6637110466.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6640117369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1660029340 + ... + 1660029343.

It is an arithmetic number, because the mean of its divisors is an integer number (2490044013).

Almost surely, 2^6640117366 is an apocalyptic number.

6640117366 is a deficient number, since it is larger than the sum of its proper divisors (3320058686).

6640117366 is a wasteful number, since it uses less digits than its factorization.

6640117366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3320058685.

The product of its (nonzero) digits is 108864, while the sum is 40.

The square root of 6640117366 is about 81486.9153054648. The cubic root of 6640117366 is about 1879.5703490395.

The spelling of 6640117366 in words is "six billion, six hundred forty million, one hundred seventeen thousand, three hundred sixty-six".