662651 has 8 divisors (see below), whose sum is σ = 730944. Its totient is φ = 595720.

The previous prime is 662647. The next prime is 662657. The reversal of 662651 is 156266.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 662651 - 2² = 662647 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 662651.

It is not an unprimeable number, because it can be changed into a prime (662657) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 896 + ... + 1458.

It is an arithmetic number, because the mean of its divisors is an integer number (91368).

2⁶⁶²⁶⁵¹ is an apocalyptic number.

662651 is a deficient number, since it is larger than the sum of its proper divisors (68293).

662651 is a wasteful number, since it uses less digits than its factorization.

662651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 681.

The product of its digits is 2160, while the sum is 26.

The square root of 662651 is about 814.0337830827. The cubic root of 662651 is about 87.1822927180.

It can be divided in two parts, 66265 and 1, that added together give a palindrome (66266).

The spelling of 662651 in words is "six hundred sixty-two thousand, six hundred fifty-one".