266738 has 8 divisors (see below), whose sum is σ = 402732. Its totient is φ = 132496.

The previous prime is 266719. The next prime is 266759. The reversal of 266738 is 837662.

It can be written as a sum of positive squares in 2 ways, for example, as 162409 + 104329 = 403^2 + 323^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×266738² = 142298321288, which contains 22 as substring.

It is a d-powerful number, because it can be written as 2¹¹ + 6⁵ + 7³ + 6⁶ + 3¹¹ + 8⁵ .

It is an unprimeable number.

266738 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56 + ... + 732.

2²⁶⁶⁷³⁸ is an apocalyptic number.

266738 is a deficient number, since it is larger than the sum of its proper divisors (135994).

266738 is a wasteful number, since it uses less digits than its factorization.

266738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 876.

The product of its digits is 12096, while the sum is 32.

The square root of 266738 is about 516.4668430790. The cubic root of 266738 is about 64.3716977600.

The spelling of 266738 in words is "two hundred sixty-six thousand, seven hundred thirty-eight".