1667122001 has 4 divisors (see below), whose sum is σ = 1667249904. Its totient is φ = 1666994100.

The previous prime is 1667121991. The next prime is 1667122027. The reversal of 1667122001 is 1002217661.

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 1667122001 - 2¹⁰ = 1667120977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1667122091) 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, 41855 + ... + 71316.

It is an arithmetic number, because the mean of its divisors is an integer number (416812476).

Almost surely, 2^1667122001 is an apocalyptic number.

It is an amenable number.

1667122001 is a deficient number, since it is larger than the sum of its proper divisors (127903).

1667122001 is a wasteful number, since it uses less digits than its factorization.

1667122001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127902.

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 1667122001 is about 40830.4053494452. The cubic root of 1667122001 is about 1185.7390633750.

Adding to 1667122001 its reverse (1002217661), we get a palindrome (2669339662).

The spelling of 1667122001 in words is "one billion, six hundred sixty-seven million, one hundred twenty-two thousand, one".