667422465887 has 4 divisors (see below), whose sum is σ = 668013629520. Its totient is φ = 666831302256.

The previous prime is 667422465883. The next prime is 667422465893. The reversal of 667422465887 is 788564224766.

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 667422465887 - 2² = 667422465883 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667422465883) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 295580123 + ... + 295582380.

It is an arithmetic number, because the mean of its divisors is an integer number (167003407380).

Almost surely, 2^667422465887 is an apocalyptic number.

667422465887 is a deficient number, since it is larger than the sum of its proper divisors (591163633).

667422465887 is a wasteful number, since it uses less digits than its factorization.

667422465887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 591163632.

The product of its digits is 216760320, while the sum is 65.

The spelling of 667422465887 in words is "six hundred sixty-seven billion, four hundred twenty-two million, four hundred sixty-five thousand, eight hundred eighty-seven".