667604342 has 4 divisors (see below), whose sum is σ = 1001406516. Its totient is φ = 333802170.

The previous prime is 667604341. The next prime is 667604347. The reversal of 667604342 is 243406766.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 243406766 = 2 ⋅121703383.

It is a junction number, because it is equal to n+sod(n) for n = 667604296 and 667604305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667604341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 166901084 + ... + 166901087.

It is an arithmetic number, because the mean of its divisors is an integer number (250351629).

Almost surely, 2^667604342 is an apocalyptic number.

667604342 is a deficient number, since it is larger than the sum of its proper divisors (333802174).

667604342 is a wasteful number, since it uses less digits than its factorization.

667604342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333802173.

The product of its (nonzero) digits is 145152, while the sum is 38.

The square root of 667604342 is about 25838.0405990857. The cubic root of 667604342 is about 873.9898402923.

The spelling of 667604342 in words is "six hundred sixty-seven million, six hundred four thousand, three hundred forty-two".