660074 has 4 divisors (see below), whose sum is σ = 990114. Its totient is φ = 330036.

The previous prime is 660073. The next prime is 660097. The reversal of 660074 is 470066.

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

It can be written as a sum of positive squares in only one way, i.e., 573049 + 87025 = 757^2 + 295^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (660071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165017 + ... + 165020.

2⁶⁶⁰⁰⁷⁴ is an apocalyptic number.

660074 is a deficient number, since it is larger than the sum of its proper divisors (330040).

660074 is a wasteful number, since it uses less digits than its factorization.

660074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330039.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 660074 is about 812.4493830387. The cubic root of 660074 is about 87.0691307673.

The spelling of 660074 in words is "six hundred sixty thousand, seventy-four".