667419008257 has 4 divisors (see below), whose sum is σ = 681619412736. Its totient is φ = 653218603780.

The previous prime is 667419008239. The next prime is 667419008297. The reversal of 667419008257 is 752800914766.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 667419008257 - 2¹¹ = 667419006209 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 667419008198 and 667419008207.

It is not an unprimeable number, because it can be changed into a prime (667419008297) 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, 7100202169 + ... + 7100202262.

It is an arithmetic number, because the mean of its divisors is an integer number (170404853184).

Almost surely, 2^667419008257 is an apocalyptic number.

It is an amenable number.

667419008257 is a deficient number, since it is larger than the sum of its proper divisors (14200404479).

667419008257 is a wasteful number, since it uses less digits than its factorization.

667419008257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14200404478.

The product of its (nonzero) digits is 5080320, while the sum is 55.

The spelling of 667419008257 in words is "six hundred sixty-seven billion, four hundred nineteen million, eight thousand, two hundred fifty-seven".