6667671601 has 4 divisors (see below), whose sum is σ = 6671673072. Its totient is φ = 6663670132.

The previous prime is 6667671599. The next prime is 6667671649. The reversal of 6667671601 is 1061767666.

It is a happy number.

6667671601 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6667671601 - 2¹ = 6667671599 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6667671001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1998235 + ... + 2001568.

It is an arithmetic number, because the mean of its divisors is an integer number (1667918268).

Almost surely, 2^6667671601 is an apocalyptic number.

It is an amenable number.

6667671601 is a deficient number, since it is larger than the sum of its proper divisors (4001471).

6667671601 is a wasteful number, since it uses less digits than its factorization.

6667671601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4001470.

The product of its (nonzero) digits is 381024, while the sum is 46.

The square root of 6667671601 is about 81655.8118017328. The cubic root of 6667671601 is about 1882.1666209522.

The spelling of 6667671601 in words is "six billion, six hundred sixty-seven million, six hundred seventy-one thousand, six hundred one".