667670745515 has 4 divisors (see below), whose sum is σ = 801204894624. Its totient is φ = 534136596408.

The previous prime is 667670745503. The next prime is 667670745523. The reversal of 667670745515 is 515547076766.

667670745515 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 667670745515 - 2⁴ = 667670745499 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66767074547 + ... + 66767074556.

It is an arithmetic number, because the mean of its divisors is an integer number (200301223656).

Almost surely, 2^667670745515 is an apocalyptic number.

667670745515 is a deficient number, since it is larger than the sum of its proper divisors (133534149109).

667670745515 is a wasteful number, since it uses less digits than its factorization.

667670745515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133534149108.

The product of its (nonzero) digits is 37044000, while the sum is 59.

The spelling of 667670745515 in words is "six hundred sixty-seven billion, six hundred seventy million, seven hundred forty-five thousand, five hundred fifteen".