6661660508 has 12 divisors (see below), whose sum is σ = 11662758072. Its totient is φ = 3329443920.

The previous prime is 6661660429. The next prime is 6661660513. The reversal of 6661660508 is 8050661666.

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 335735 + ... + 355022.

It is an arithmetic number, because the mean of its divisors is an integer number (971896506).

Almost surely, 2^6661660508 is an apocalyptic number.

It is an amenable number.

6661660508 is a deficient number, since it is larger than the sum of its proper divisors (5001097564).

6661660508 is a wasteful number, since it uses less digits than its factorization.

6661660508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 693172 (or 693170 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 44.

The square root of 6661660508 is about 81618.9959997059. The cubic root of 6661660508 is about 1881.6008422262.

The spelling of 6661660508 in words is "six billion, six hundred sixty-one million, six hundred sixty thousand, five hundred eight".