667206371 has 4 divisors (see below), whose sum is σ = 718529952. Its totient is φ = 615882792.

The previous prime is 667206343. The next prime is 667206377. The reversal of 667206371 is 173602766.

667206371 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, and also an emirpimes, since its reverse is a distinct semiprime: 173602766 = 2 ⋅86801383.

It is a cyclic number.

It is not a de Polignac number, because 667206371 - 2⁶ = 667206307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (667206377) 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, 25661771 + ... + 25661796.

It is an arithmetic number, because the mean of its divisors is an integer number (179632488).

Almost surely, 2^667206371 is an apocalyptic number.

667206371 is a deficient number, since it is larger than the sum of its proper divisors (51323581).

667206371 is a wasteful number, since it uses less digits than its factorization.

667206371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51323580.

The product of its (nonzero) digits is 63504, while the sum is 38.

The square root of 667206371 is about 25830.3381898108. The cubic root of 667206371 is about 873.8161387318.

The spelling of 667206371 in words is "six hundred sixty-seven million, two hundred six thousand, three hundred seventy-one".