661102 has 16 divisors (see below), whose sum is σ = 1092672. Its totient is φ = 298080.

The previous prime is 661099. The next prime is 661103. The reversal of 661102 is 201166.

661102 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (661103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 952 + ... + 1492.

It is an arithmetic number, because the mean of its divisors is an integer number (68292).

2⁶⁶¹¹⁰² is an apocalyptic number.

661102 is a deficient number, since it is larger than the sum of its proper divisors (431570).

661102 is a wasteful number, since it uses less digits than its factorization.

661102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 603.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 661102 is about 813.0817917036. The cubic root of 661102 is about 87.1143078437.

Adding to 661102 its reverse (201166), we get a palindrome (862268).

The spelling of 661102 in words is "six hundred sixty-one thousand, one hundred two".