4001667 has 4 divisors (see below), whose sum is σ = 5335560. Its totient is φ = 2667776.

The previous prime is 4001639. The next prime is 4001689. The reversal of 4001667 is 7661004.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 4001667 - 2⁶ = 4001603 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (4001617) 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, 666942 + ... + 666947.

It is an arithmetic number, because the mean of its divisors is an integer number (1333890).

Almost surely, 2^4001667 is an apocalyptic number.

4001667 is a deficient number, since it is larger than the sum of its proper divisors (1333893).

4001667 is a wasteful number, since it uses less digits than its factorization.

4001667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1333892.

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 4001667 is about 2000.4167065889. The cubic root of 4001667 is about 158.7621537805.

The spelling of 4001667 in words is "four million, one thousand, six hundred sixty-seven".