766645 has 16 divisors (see below), whose sum is σ = 1026432. Its totient is φ = 544960.

The previous prime is 766639. The next prime is 766651. The reversal of 766645 is 546667.

It is an interprime number because it is at equal distance from previous prime (766639) and next prime (766651).

It is not a de Polignac number, because 766645 - 2³ = 766637 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 766645.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2784 + ... + 3046.

It is an arithmetic number, because the mean of its divisors is an integer number (64152).

2⁷⁶⁶⁶⁴⁵ is an apocalyptic number.

It is an amenable number.

766645 is a deficient number, since it is larger than the sum of its proper divisors (259787).

766645 is a wasteful number, since it uses less digits than its factorization.

766645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332.

The product of its digits is 30240, while the sum is 34.

The square root of 766645 is about 875.5826631449. The cubic root of 766645 is about 91.5232504841.

The spelling of 766645 in words is "seven hundred sixty-six thousand, six hundred forty-five".