668037067 has 4 divisors (see below), whose sum is σ = 684330696. Its totient is φ = 651743440.

The previous prime is 668037053. The next prime is 668037107. The reversal of 668037067 is 760730866.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-668037067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (668037467) 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, 8146753 + ... + 8146834.

It is an arithmetic number, because the mean of its divisors is an integer number (171082674).

Almost surely, 2^668037067 is an apocalyptic number.

668037067 is a deficient number, since it is larger than the sum of its proper divisors (16293629).

668037067 is a wasteful number, since it uses less digits than its factorization.

668037067 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16293628.

The product of its (nonzero) digits is 254016, while the sum is 43.

The square root of 668037067 is about 25846.4130393368. The cubic root of 668037067 is about 874.1786325387.

The spelling of 668037067 in words is "six hundred sixty-eight million, thirty-seven thousand, sixty-seven".