6391966740 has 48 divisors (see below), whose sum is σ = 18190919040. Its totient is φ = 1676580480.

The previous prime is 6391966733. The next prime is 6391966741. The reversal of 6391966740 is 476691936.

It is a hoax number, since the sum of its digits (51) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6391966741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 869560 + ... + 876879.

It is an arithmetic number, because the mean of its divisors is an integer number (378977480).

Almost surely, 2^6391966740 is an apocalyptic number.

6391966740 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6391966740 is an abundant number, since it is smaller than the sum of its proper divisors (11798952300).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6391966740 is a wasteful number, since it uses less digits than its factorization.

6391966740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1746512 (or 1746510 counting only the distinct ones).

The product of its (nonzero) digits is 1469664, while the sum is 51.

The square root of 6391966740 is about 79949.7763599124. The cubic root of 6391966740 is about 1855.8583938268.

The spelling of 6391966740 in words is "six billion, three hundred ninety-one million, nine hundred sixty-six thousand, seven hundred forty".