667143743 has 4 divisors (see below), whose sum is σ = 762450000. Its totient is φ = 571837488.

The previous prime is 667143731. The next prime is 667143769. The reversal of 667143743 is 347341766.

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

It is a cyclic number.

It is not a de Polignac number, because 667143743 - 2¹⁶ = 667078207 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 667143743.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667143443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47653118 + ... + 47653131.

It is an arithmetic number, because the mean of its divisors is an integer number (190612500).

Almost surely, 2^667143743 is an apocalyptic number.

667143743 is a deficient number, since it is larger than the sum of its proper divisors (95306257).

667143743 is an equidigital number, since it uses as much as digits as its factorization.

667143743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95306256.

The product of its digits is 254016, while the sum is 41.

The square root of 667143743 is about 25829.1258659677. The cubic root of 667143743 is about 873.7887973314.

The spelling of 667143743 in words is "six hundred sixty-seven million, one hundred forty-three thousand, seven hundred forty-three".