662981 has 4 divisors (see below), whose sum is σ = 723264. Its totient is φ = 602700.

The previous prime is 662957. The next prime is 662999. The reversal of 662981 is 189266.

662981 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 662981 - 2⁶ = 662917 is a prime.

It is a super-2 number, since 2×662981² = 879087612722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (662941) 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, 30125 + ... + 30146.

It is an arithmetic number, because the mean of its divisors is an integer number (180816).

2⁶⁶²⁹⁸¹ is an apocalyptic number.

It is an amenable number.

662981 is a deficient number, since it is larger than the sum of its proper divisors (60283).

662981 is a wasteful number, since it uses less digits than its factorization.

662981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60282.

The product of its digits is 5184, while the sum is 32.

The square root of 662981 is about 814.2364521440. The cubic root of 662981 is about 87.1967625681.

The spelling of 662981 in words is "six hundred sixty-two thousand, nine hundred eighty-one".