6996687840 has 72 divisors (see below), whose sum is σ = 23876202168. Its totient is φ = 1865783040.

The previous prime is 6996687839. The next prime is 6996687869. The reversal of 6996687840 is 487866996.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2427966 + ... + 2430845.

It is an arithmetic number, because the mean of its divisors is an integer number (331613919).

Almost surely, 2^6996687840 is an apocalyptic number.

6996687840 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6996687840 is an abundant number, since it is smaller than the sum of its proper divisors (16879514328).

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

6996687840 is a wasteful number, since it uses less digits than its factorization.

6996687840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4858832 (or 4858821 counting only the distinct ones).

The product of its (nonzero) digits is 31352832, while the sum is 63.

The square root of 6996687840 is about 83646.2063694463. The cubic root of 6996687840 is about 1912.6294240236.

The spelling of 6996687840 in words is "six billion, nine hundred ninety-six million, six hundred eighty-seven thousand, eight hundred forty".