667227457 has 4 divisors (see below), whose sum is σ = 718552660. Its totient is φ = 615902256.

The previous prime is 667227439. The next prime is 667227461. The reversal of 667227457 is 754722766.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 34000561 + 633226896 = 5831^2 + 25164^2 .

It is a cyclic number.

It is not a de Polignac number, because 667227457 - 2⁷ = 667227329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (667227437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25662582 + ... + 25662607.

It is an arithmetic number, because the mean of its divisors is an integer number (179638165).

Almost surely, 2^667227457 is an apocalyptic number.

It is an amenable number.

667227457 is a deficient number, since it is larger than the sum of its proper divisors (51325203).

667227457 is a wasteful number, since it uses less digits than its factorization.

667227457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51325202.

The product of its digits is 987840, while the sum is 46.

The square root of 667227457 is about 25830.7463500380. The cubic root of 667227457 is about 873.8253438262.

The spelling of 667227457 in words is "six hundred sixty-seven million, two hundred twenty-seven thousand, four hundred fifty-seven".