2005051667 has 4 divisors (see below), whose sum is σ = 2029209000. Its totient is φ = 1980894336.

The previous prime is 2005051661. The next prime is 2005051669. The reversal of 2005051667 is 7661505002.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2005051667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2005051661) 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, 12078542 + ... + 12078707.

It is an arithmetic number, because the mean of its divisors is an integer number (507302250).

Almost surely, 2^2005051667 is an apocalyptic number.

2005051667 is a deficient number, since it is larger than the sum of its proper divisors (24157333).

2005051667 is an equidigital number, since it uses as much as digits as its factorization.

2005051667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24157332.

The product of its (nonzero) digits is 12600, while the sum is 32.

The square root of 2005051667 is about 44777.8032846633. The cubic root of 2005051667 is about 1260.9809416235.

Adding to 2005051667 its reverse (7661505002), we get a palindrome (9666556669).

It can be divided in two parts, 20050 and 51667, that added together give a palindrome (71717).

The spelling of 2005051667 in words is "two billion, five million, fifty-one thousand, six hundred sixty-seven".