667487053123 has 4 divisors (see below), whose sum is σ = 728167694328. Its totient is φ = 606806411920.

The previous prime is 667487053091. The next prime is 667487053139. The reversal of 667487053123 is 321350784766.

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 667487053123 - 2⁵ = 667487053091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (667487053183) 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, 30340320586 + ... + 30340320607.

It is an arithmetic number, because the mean of its divisors is an integer number (182041923582).

Almost surely, 2^667487053123 is an apocalyptic number.

667487053123 is a deficient number, since it is larger than the sum of its proper divisors (60680641205).

667487053123 is a wasteful number, since it uses less digits than its factorization.

667487053123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60680641204.

The product of its (nonzero) digits is 5080320, while the sum is 52.

The spelling of 667487053123 in words is "six hundred sixty-seven billion, four hundred eighty-seven million, fifty-three thousand, one hundred twenty-three".