356665 has 4 divisors (see below), whose sum is σ = 428004. Its totient is φ = 285328.

The previous prime is 356663. The next prime is 356693. The reversal of 356665 is 566653.

It is a happy number.

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 137641 + 219024 = 371^2 + 468^2 .

It is a cyclic number.

It is not a de Polignac number, because 356665 - 2¹ = 356663 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (356663) 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, 35662 + ... + 35671.

It is an arithmetic number, because the mean of its divisors is an integer number (107001).

2³⁵⁶⁶⁶⁵ is an apocalyptic number.

It is an amenable number.

356665 is a deficient number, since it is larger than the sum of its proper divisors (71339).

356665 is an equidigital number, since it uses as much as digits as its factorization.

356665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71338.

The product of its digits is 16200, while the sum is 31.

The square root of 356665 is about 597.2143668734. The cubic root of 356665 is about 70.9175131450.

The spelling of 356665 in words is "three hundred fifty-six thousand, six hundred sixty-five".