2001571667 has 8 divisors (see below), whose sum is σ = 2017487472. Its totient is φ = 1985709600.

The previous prime is 2001571633. The next prime is 2001571669. The reversal of 2001571667 is 7661751002.

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 2001571667 - 2¹⁰ = 2001570643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2001571669) 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, 63068 + ... + 89334.

It is an arithmetic number, because the mean of its divisors is an integer number (252185934).

Almost surely, 2^2001571667 is an apocalyptic number.

2001571667 is a deficient number, since it is larger than the sum of its proper divisors (15915805).

2001571667 is a wasteful number, since it uses less digits than its factorization.

2001571667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26869.

The product of its (nonzero) digits is 17640, while the sum is 35.

The square root of 2001571667 is about 44738.9278704799. The cubic root of 2001571667 is about 1260.2509928727.

The spelling of 2001571667 in words is "two billion, one million, five hundred seventy-one thousand, six hundred sixty-seven".