6661421308 has 12 divisors (see below), whose sum is σ = 11848594072. Its totient is φ = 3276108720.

The previous prime is 6661421243. The next prime is 6661421311. The reversal of 6661421308 is 8031241666.

It is a happy number.

It is a hoax number, since the sum of its digits (37) 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, 13650210 + ... + 13650697.

Almost surely, 2^6661421308 is an apocalyptic number.

It is an amenable number.

6661421308 is a deficient number, since it is larger than the sum of its proper divisors (5187172764).

6661421308 is a wasteful number, since it uses less digits than its factorization.

6661421308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27300972 (or 27300970 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 6661421308 is about 81617.5306414008. The cubic root of 6661421308 is about 1881.5783210991.

The spelling of 6661421308 in words is "six billion, six hundred sixty-one million, four hundred twenty-one thousand, three hundred eight".