661010 has 48 divisors (see below), whose sum is σ = 1477440. Its totient is φ = 211680.

The previous prime is 661009. The next prime is 661019. The reversal of 661010 is 10166.

661010 is nontrivially palindromic in base 6.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a Curzon number.

It is a nialpdrome in base 7.

It is not an unprimeable number, because it can be changed into a prime (661019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9275 + ... + 9345.

It is an arithmetic number, because the mean of its divisors is an integer number (30780).

2⁶⁶¹⁰¹⁰ is an apocalyptic number.

661010 is an abundant number, since it is smaller than the sum of its proper divisors (816430).

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

661010 is a wasteful number, since it uses less digits than its factorization.

661010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111 (or 104 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 661010 is about 813.0252148611. The cubic root of 661010 is about 87.1102666679.

Adding to 661010 its reverse (10166), we get a palindrome (671176).

It can be divided in two parts, 6 and 61010, that added together give a palindrome (61016).

The spelling of 661010 in words is "six hundred sixty-one thousand, ten".