1667709703121 has 32 divisors (see below), whose sum is σ = 2172242534400. Its totient is φ = 1241512937280.

The previous prime is 1667709703117. The next prime is 1667709703193. The reversal of 1667709703121 is 1213079077661.

It is not a de Polignac number, because 1667709703121 - 2² = 1667709703117 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1667709703121.

It is not an unprimeable number, because it can be changed into a prime (1667709703721) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 900200 + ... + 2036118.

It is an arithmetic number, because the mean of its divisors is an integer number (67882579200).

Almost surely, 2^{1667709703121} is an apocalyptic number.

1667709703121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1667709703121 is a deficient number, since it is larger than the sum of its proper divisors (504532831279).

1667709703121 is a wasteful number, since it uses less digits than its factorization.

1667709703121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1136789.

The product of its (nonzero) digits is 666792, while the sum is 50.

The spelling of 1667709703121 in words is "one trillion, six hundred sixty-seven billion, seven hundred nine million, seven hundred three thousand, one hundred twenty-one".