661852 has 6 divisors (see below), whose sum is σ = 1158248. Its totient is φ = 330924.

The previous prime is 661849. The next prime is 661873. The reversal of 661852 is 258166.

It is a super-4 number, since 4×661852⁴ (a number of 24 digits) contains 4444 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 661852.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82728 + ... + 82735.

2⁶⁶¹⁸⁵² is an apocalyptic number.

It is an amenable number.

661852 is a deficient number, since it is larger than the sum of its proper divisors (496396).

661852 is a wasteful number, since it uses less digits than its factorization.

661852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165467 (or 165465 counting only the distinct ones).

The product of its digits is 2880, while the sum is 28.

The square root of 661852 is about 813.5428691839. The cubic root of 661852 is about 87.1472382333.

It can be divided in two parts, 6618 and 52, that added together give a triangular number (6670 = T₁₁₅).

The spelling of 661852 in words is "six hundred sixty-one thousand, eight hundred fifty-two".