1667440141 has 4 divisors (see below), whose sum is σ = 1672245792. Its totient is φ = 1662634492.

The previous prime is 1667440139. The next prime is 1667440147. The reversal of 1667440141 is 1410447661.

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 1667440141 - 2¹ = 1667440139 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1667440097 and 1667440106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1667440147) 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, 2402305 + ... + 2402998.

It is an arithmetic number, because the mean of its divisors is an integer number (418061448).

Almost surely, 2^1667440141 is an apocalyptic number.

It is an amenable number.

1667440141 is a deficient number, since it is larger than the sum of its proper divisors (4805651).

1667440141 is an equidigital number, since it uses as much as digits as its factorization.

1667440141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4805650.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 1667440141 is about 40834.3010347918. The cubic root of 1667440141 is about 1185.8144841764.

The spelling of 1667440141 in words is "one billion, six hundred sixty-seven million, four hundred forty thousand, one hundred forty-one".