2081667 has 30 divisors (see below), whose sum is σ = 3439628. Its totient is φ = 1119552.

The previous prime is 2081647. The next prime is 2081671. The reversal of 2081667 is 7661802.

It is a happy number.

It is not a de Polignac number, because 2081667 - 2⁶ = 2081603 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (2081617) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 122443 + ... + 122459.

2^2081667 is an apocalyptic number.

2081667 is a deficient number, since it is larger than the sum of its proper divisors (1357961).

2081667 is an frugal number, since it uses more digits than its factorization.

2081667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65 (or 27 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 2081667 is about 1442.7983227049. The cubic root of 2081667 is about 127.6841782643.

The spelling of 2081667 in words is "two million, eighty-one thousand, six hundred sixty-seven".