661183 has 2 divisors, whose sum is σ = 661184. Its totient is φ = 661182.

The previous prime is 661139. The next prime is 661187. The reversal of 661183 is 381166.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 661183 - 2¹³ = 652991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (661187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330591 + 330592.

It is an arithmetic number, because the mean of its divisors is an integer number (330592).

2⁶⁶¹¹⁸³ is an apocalyptic number.

661183 is a deficient number, since it is larger than the sum of its proper divisors (1).

661183 is an equidigital number, since it uses as much as digits as its factorization.

661183 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 25.

The square root of 661183 is about 813.1316006650. The cubic root of 661183 is about 87.1178655250.

The spelling of 661183 in words is "six hundred sixty-one thousand, one hundred eighty-three".