667057 has 4 divisors (see below), whose sum is σ = 668736. Its totient is φ = 665380.

The previous prime is 667021. The next prime is 667081. The reversal of 667057 is 750766.

667057 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 a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 667057 - 2⁷ = 666929 is a prime.

It is a Duffinian number.

667057 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (667657) 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, 132 + ... + 1162.

It is an arithmetic number, because the mean of its divisors is an integer number (167184).

2⁶⁶⁷⁰⁵⁷ is an apocalyptic number.

It is an amenable number.

667057 is a deficient number, since it is larger than the sum of its proper divisors (1679).

667057 is a wasteful number, since it uses less digits than its factorization.

667057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1678.

The product of its (nonzero) digits is 8820, while the sum is 31.

The square root of 667057 is about 816.7355753241. The cubic root of 667057 is about 87.3750925260.

The spelling of 667057 in words is "six hundred sixty-seven thousand, fifty-seven".