6681450401 has 8 divisors (see below), whose sum is σ = 6739281000. Its totient is φ = 6623793280.

The previous prime is 6681450383. The next prime is 6681450443. The reversal of 6681450401 is 1040541866.

It can be written as a sum of positive squares in 4 ways, for example, as 22801 + 6681427600 = 151^2 + 81740^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6681450401 - 2⁶ = 6681450337 is a prime.

It is a super-2 number, since 2×6681450401² = 89283558922046121602, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6681450701) 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 7 ways as a sum of consecutive naturals, for example, 34595 + ... + 120663.

It is an arithmetic number, because the mean of its divisors is an integer number (842410125).

Almost surely, 2^6681450401 is an apocalyptic number.

It is an amenable number.

6681450401 is a deficient number, since it is larger than the sum of its proper divisors (57830599).

6681450401 is a wasteful number, since it uses less digits than its factorization.

6681450401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86739.

The product of its (nonzero) digits is 23040, while the sum is 35.

The square root of 6681450401 is about 81740.1394725994. The cubic root of 6681450401 is about 1883.4622333335.

The spelling of 6681450401 in words is "six billion, six hundred eighty-one million, four hundred fifty thousand, four hundred one".