345766 has 4 divisors (see below), whose sum is σ = 518652. Its totient is φ = 172882.

The previous prime is 345757. The next prime is 345769. The reversal of 345766 is 667543.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 667543 = 103 ⋅6481.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (345769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86440 + ... + 86443.

It is an arithmetic number, because the mean of its divisors is an integer number (129663).

2³⁴⁵⁷⁶⁶ is an apocalyptic number.

345766 is a deficient number, since it is larger than the sum of its proper divisors (172886).

345766 is a wasteful number, since it uses less digits than its factorization.

345766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172885.

The product of its digits is 15120, while the sum is 31.

The square root of 345766 is about 588.0187071854. The cubic root of 345766 is about 70.1876597275.

It can be divided in two parts, 345 and 766, that added together give a palindrome (1111).

The spelling of 345766 in words is "three hundred forty-five thousand, seven hundred sixty-six".