667756342 has 32 divisors (see below), whose sum is σ = 1109937024. Its totient is φ = 298771200.

The previous prime is 667756321. The next prime is 667756343. The reversal of 667756342 is 243657766.

It is a junction number, because it is equal to n+sod(n) for n = 667756292 and 667756301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667756343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 449533 + ... + 451015.

It is an arithmetic number, because the mean of its divisors is an integer number (34685532).

Almost surely, 2^667756342 is an apocalyptic number.

667756342 is a deficient number, since it is larger than the sum of its proper divisors (442180682).

667756342 is a wasteful number, since it uses less digits than its factorization.

667756342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1804.

The product of its digits is 1270080, while the sum is 46.

The square root of 667756342 is about 25840.9818311921. The cubic root of 667756342 is about 874.0561651929.

The spelling of 667756342 in words is "six hundred sixty-seven million, seven hundred fifty-six thousand, three hundred forty-two".