1667323980001 has 3 divisors (see below), whose sum is σ = 1667325271251. Its totient is φ = 1667322688752.

The previous prime is 1667323979987. The next prime is 1667323980013. The reversal of 1667323980001 is 1000893237661.

The square root of 1667323980001 is 1291249.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 126540001 + 1667197440000 = 11249^2 + 1291200^2 .

It is not a de Polignac number, because 1667323980001 - 2⁵ = 1667323979969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1667323980041) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 645625 + ... + 1936873.

It is an arithmetic number, because the mean of its divisors is an integer number (555775090417).

Almost surely, 2^{1667323980001} is an apocalyptic number.

1667323980001 is the 1291249-th square number.

1667323980001 is the 645625-th centered octagonal number.

It is an amenable number.

1667323980001 is a deficient number, since it is larger than the sum of its proper divisors (1291250).

1667323980001 is an frugal number, since it uses more digits than its factorization.

1667323980001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2582498 (or 1291249 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 46.

The spelling of 1667323980001 in words is "one trillion, six hundred sixty-seven billion, three hundred twenty-three million, nine hundred eighty thousand, one".