667420608703 has 4 divisors (see below), whose sum is σ = 667459359648. Its totient is φ = 667381857760.

The previous prime is 667420608689. The next prime is 667420608709. The reversal of 667420608703 is 307806024766.

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 667420608703 - 2¹⁷ = 667420477631 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667420608709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19349626 + ... + 19384087.

It is an arithmetic number, because the mean of its divisors is an integer number (166864839912).

Almost surely, 2^667420608703 is an apocalyptic number.

667420608703 is a deficient number, since it is larger than the sum of its proper divisors (38750945).

667420608703 is a wasteful number, since it uses less digits than its factorization.

667420608703 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38750944.

The product of its (nonzero) digits is 2032128, while the sum is 49.

The spelling of 667420608703 in words is "six hundred sixty-seven billion, four hundred twenty million, six hundred eight thousand, seven hundred three".