1667662142 has 8 divisors (see below), whose sum is σ = 2502232176. Its totient is φ = 833584752.

The previous prime is 1667662069. The next prime is 1667662147. The reversal of 1667662142 is 2412667661.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1667662142.

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, 114578 + ... + 128309.

It is an arithmetic number, because the mean of its divisors is an integer number (312779022).

Almost surely, 2^1667662142 is an apocalyptic number.

1667662142 is a deficient number, since it is larger than the sum of its proper divisors (834570034).

1667662142 is a wasteful number, since it uses less digits than its factorization.

1667662142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246322.

The product of its digits is 145152, while the sum is 41.

The square root of 1667662142 is about 40837.0192594905. The cubic root of 1667662142 is about 1185.8671078184.

The spelling of 1667662142 in words is "one billion, six hundred sixty-seven million, six hundred sixty-two thousand, one hundred forty-two".