1667684442 has 24 divisors (see below), whose sum is σ = 3392901216. Its totient is φ = 546466024.

The previous prime is 1667684419. The next prime is 1667684449. The reversal of 1667684442 is 2444867661.

It is a junction number, because it is equal to n+sod(n) for n = 1667684391 and 1667684400.

It is not an unprimeable number, because it can be changed into a prime (1667684449) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19038 + ... + 60809.

It is an arithmetic number, because the mean of its divisors is an integer number (141370884).

Almost surely, 2^1667684442 is an apocalyptic number.

1667684442 is an abundant number, since it is smaller than the sum of its proper divisors (1725216774).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1667684442 is an equidigital number, since it uses as much as digits as its factorization.

1667684442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79970 (or 79911 counting only the distinct ones).

The product of its digits is 1548288, while the sum is 48.

The square root of 1667684442 is about 40837.2922951559. The cubic root of 1667684442 is about 1185.8723936050.

The spelling of 1667684442 in words is "one billion, six hundred sixty-seven million, six hundred eighty-four thousand, four hundred forty-two".