6681601477 has 8 divisors (see below), whose sum is σ = 7076424600. Its totient is φ = 6286977024.

The previous prime is 6681601469. The next prime is 6681601489. The reversal of 6681601477 is 7741061866.

It can be written as a sum of positive squares in 4 ways, for example, as 1121513121 + 5560088356 = 33489^2 + 74566^2 .

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 6681601477 - 2³ = 6681601469 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6681631477) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22599 + ... + 117787.

It is an arithmetic number, because the mean of its divisors is an integer number (884553075).

Almost surely, 2^6681601477 is an apocalyptic number.

It is an amenable number.

6681601477 is a deficient number, since it is larger than the sum of its proper divisors (394823123).

6681601477 is a wasteful number, since it uses less digits than its factorization.

6681601477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99335.

The product of its (nonzero) digits is 338688, while the sum is 46.

The square root of 6681601477 is about 81741.0635910740. The cubic root of 6681601477 is about 1883.4764290434.

The spelling of 6681601477 in words is "six billion, six hundred eighty-one million, six hundred one thousand, four hundred seventy-seven".