1666000067 has 4 divisors (see below), whose sum is σ = 1666090680. Its totient is φ = 1665909456.

The previous prime is 1666000057. The next prime is 1666000069. The reversal of 1666000067 is 7600006661.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1666000067 - 2⁶ = 1666000003 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1665999997 and 1666000042.

It is not an unprimeable number, because it can be changed into a prime (1666000069) 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, 6842 + ... + 58127.

It is an arithmetic number, because the mean of its divisors is an integer number (416522670).

Almost surely, 2^1666000067 is an apocalyptic number.

1666000067 is a deficient number, since it is larger than the sum of its proper divisors (90613).

1666000067 is an equidigital number, since it uses as much as digits as its factorization.

1666000067 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90612.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 1666000067 is about 40816.6640846603. The cubic root of 1666000067 is about 1185.4730121589.

The spelling of 1666000067 in words is "one billion, six hundred sixty-six million, sixty-seven", and thus it is an aban number.