1667662141 has 4 divisors (see below), whose sum is σ = 1765759932. Its totient is φ = 1569564352.

The previous prime is 1667662069. The next prime is 1667662147. The reversal of 1667662141 is 1412667661.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1202008900 + 465653241 = 34670^2 + 21579^2 .

It is a cyclic number.

It is not a de Polignac number, because 1667662141 - 2¹⁹ = 1667137853 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1667662094 and 1667662103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1667662147) 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, 49048870 + ... + 49048903.

It is an arithmetic number, because the mean of its divisors is an integer number (441439983).

Almost surely, 2^1667662141 is an apocalyptic number.

It is an amenable number.

1667662141 is a deficient number, since it is larger than the sum of its proper divisors (98097791).

1667662141 is an equidigital number, since it uses as much as digits as its factorization.

1667662141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98097790.

The product of its digits is 72576, while the sum is 40.

The square root of 1667662141 is about 40837.0192472467. The cubic root of 1667662141 is about 1185.8671075814.

The spelling of 1667662141 in words is "one billion, six hundred sixty-seven million, six hundred sixty-two thousand, one hundred forty-one".