667038742 has 8 divisors (see below), whose sum is σ = 1000667736. Its totient is φ = 333482832.

The previous prime is 667038739. The next prime is 667038781. The reversal of 667038742 is 247830766.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26098 + ... + 44890.

It is an arithmetic number, because the mean of its divisors is an integer number (125083467).

Almost surely, 2^667038742 is an apocalyptic number.

667038742 is a deficient number, since it is larger than the sum of its proper divisors (333628994).

667038742 is a wasteful number, since it uses less digits than its factorization.

667038742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36542.

The product of its (nonzero) digits is 338688, while the sum is 43.

The square root of 667038742 is about 25827.0931775142. The cubic root of 667038742 is about 873.7429533823.

The spelling of 667038742 in words is "six hundred sixty-seven million, thirty-eight thousand, seven hundred forty-two".