66674 has 16 divisors (see below), whose sum is σ = 110808. Its totient is φ = 29952.

The previous prime is 66653. The next prime is 66683. The reversal of 66674 is 47666.

66674 = 6² + 7² + ... + 58².

It can be written as a sum of positive squares in 4 ways, for example, as 66049 + 625 = 257^2 + 25^2 .

It is a Curzon number.

It is a plaindrome in base 13.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1232 + ... + 1284.

2⁶⁶⁶⁷⁴ is an apocalyptic number.

66674 is a deficient number, since it is larger than the sum of its proper divisors (44134).

66674 is a wasteful number, since it uses less digits than its factorization.

66674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109.

The product of its digits is 6048, while the sum is 29.

The square root of 66674 is about 258.2130902956. The cubic root of 66674 is about 40.5495000098.

It can be divided in two parts, 666 and 74, that multiplied together give a square (49284 = 222²).

The spelling of 66674 in words is "sixty-six thousand, six hundred seventy-four".