667071023 has 4 divisors (see below), whose sum is σ = 675515040. Its totient is φ = 658627008.

The previous prime is 667070983. The next prime is 667071101. The reversal of 667071023 is 320170766.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 320170766 = 2 ⋅160085383.

It is a cyclic number.

It is not a de Polignac number, because 667071023 - 2¹⁴ = 667054639 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 (667071623) 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, 4221890 + ... + 4222047.

It is an arithmetic number, because the mean of its divisors is an integer number (168878760).

Almost surely, 2^667071023 is an apocalyptic number.

667071023 is a deficient number, since it is larger than the sum of its proper divisors (8444017).

667071023 is an equidigital number, since it uses as much as digits as its factorization.

667071023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8444016.

The product of its (nonzero) digits is 10584, while the sum is 32.

The square root of 667071023 is about 25827.7181144599. The cubic root of 667071023 is about 873.7570479366.

The spelling of 667071023 in words is "six hundred sixty-seven million, seventy-one thousand, twenty-three".