66670000667 has 4 divisors (see below), whose sum is σ = 67079019240. Its totient is φ = 66260982096.

The previous prime is 66670000651. The next prime is 66670000703. The reversal of 66670000667 is 76600007666.

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 66670000667 - 2⁴ = 66670000651 is a prime.

It is a super-3 number, since 3×66670000667³ (a number of 33 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66670000627) 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, 204509042 + ... + 204509367.

It is an arithmetic number, because the mean of its divisors is an integer number (16769754810).

Almost surely, 2^66670000667 is an apocalyptic number.

66670000667 is a deficient number, since it is larger than the sum of its proper divisors (409018573).

66670000667 is a wasteful number, since it uses less digits than its factorization.

66670000667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409018572.

The product of its (nonzero) digits is 381024, while the sum is 44.

The spelling of 66670000667 in words is "sixty-six billion, six hundred seventy million, six hundred sixty-seven", and thus it is an aban number.