662761 has 4 divisors (see below), whose sum is σ = 723024. Its totient is φ = 602500.

The previous prime is 662743. The next prime is 662771. The reversal of 662761 is 167266.

662761 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 662761 - 2¹⁷ = 531689 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (662771) 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, 30115 + ... + 30136.

It is an arithmetic number, because the mean of its divisors is an integer number (180756).

2⁶⁶²⁷⁶¹ is an apocalyptic number.

It is an amenable number.

662761 is a deficient number, since it is larger than the sum of its proper divisors (60263).

662761 is a wasteful number, since it uses less digits than its factorization.

662761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60262.

The product of its digits is 3024, while the sum is 28.

The square root of 662761 is about 814.1013450425. The cubic root of 662761 is about 87.1871165350.

The spelling of 662761 in words is "six hundred sixty-two thousand, seven hundred sixty-one".