766620 has 36 divisors (see below), whose sum is σ = 2325960. Its totient is φ = 204384.

The previous prime is 766609. The next prime is 766637. The reversal of 766620 is 26667.

766620 = T₆₁ + T₆₂ + ... + T₁₆₈.

It is a tau number, because it is divible by the number of its divisors (36).

It is a nialpdrome in base 10.

It is a congruent number.

It is an unprimeable number.

766620 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1950 + ... + 2309.

It is an arithmetic number, because the mean of its divisors is an integer number (64610).

2⁷⁶⁶⁶²⁰ is an apocalyptic number.

It is an amenable number.

766620 is an abundant number, since it is smaller than the sum of its proper divisors (1559340).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

766620 is a wasteful number, since it uses less digits than its factorization.

766620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4274 (or 4269 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 766620 is about 875.5683868208. The cubic root of 766620 is about 91.5222556272.

The spelling of 766620 in words is "seven hundred sixty-six thousand, six hundred twenty".