661882 has 8 divisors (see below), whose sum is σ = 1069236. Its totient is φ = 305472.

The previous prime is 661879. The next prime is 661883. The reversal of 661882 is 288166.

661882 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 502681 + 159201 = 709^2 + 399^2 .

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

It is not an unprimeable number, because it can be changed into a prime (661883) 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, 12703 + ... + 12754.

2⁶⁶¹⁸⁸² is an apocalyptic number.

661882 is a deficient number, since it is larger than the sum of its proper divisors (407354).

661882 is a wasteful number, since it uses less digits than its factorization.

661882 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25472.

The product of its digits is 4608, while the sum is 31.

The square root of 661882 is about 813.5613068479. The cubic root of 661882 is about 87.1485549313.

The spelling of 661882 in words is "six hundred sixty-one thousand, eight hundred eighty-two".