6981336720 has 60 divisors (see below), whose sum is σ = 23445658236. Its totient is φ = 1861689600.

The previous prime is 6981336673. The next prime is 6981336727. The reversal of 6981336720 is 276331896.

It can be written as a sum of positive squares in 2 ways, for example, as 2738638224 + 4242698496 = 52332^2 + 65136^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (6981336727) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4847431 + ... + 4848870.

Almost surely, 2^6981336720 is an apocalyptic number.

6981336720 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6981336720 is an abundant number, since it is smaller than the sum of its proper divisors (16464321516).

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

6981336720 is a wasteful number, since it uses less digits than its factorization.

6981336720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9696320 (or 9696311 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 45.

The square root of 6981336720 is about 83554.3937803393. The cubic root of 6981336720 is about 1911.2295948516.

The spelling of 6981336720 in words is "six billion, nine hundred eighty-one million, three hundred thirty-six thousand, seven hundred twenty".