661283 has 8 divisors (see below), whose sum is σ = 800352. Its totient is φ = 533376.

The previous prime is 661267. The next prime is 661321. The reversal of 661283 is 382166.

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

It is a cyclic number.

It is not a de Polignac number, because 661283 - 2⁴ = 661267 is a prime.

It is not an unprimeable number, because it can be changed into a prime (661253) 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, 2660 + ... + 2897.

It is an arithmetic number, because the mean of its divisors is an integer number (100044).

2⁶⁶¹²⁸³ is an apocalyptic number.

661283 is a deficient number, since it is larger than the sum of its proper divisors (139069).

661283 is a wasteful number, since it uses less digits than its factorization.

661283 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5581.

The product of its digits is 1728, while the sum is 26.

The square root of 661283 is about 813.1930890016. The cubic root of 661283 is about 87.1222573235.

The spelling of 661283 in words is "six hundred sixty-one thousand, two hundred eighty-three".