661148 has 6 divisors (see below), whose sum is σ = 1157016. Its totient is φ = 330572.

The previous prime is 661139. The next prime is 661183. The reversal of 661148 is 841166.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 661148.

It is an unprimeable number.

661148 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82640 + ... + 82647.

It is an arithmetic number, because the mean of its divisors is an integer number (192836).

2⁶⁶¹¹⁴⁸ is an apocalyptic number.

It is an amenable number.

661148 is a deficient number, since it is larger than the sum of its proper divisors (495868).

661148 is a wasteful number, since it uses less digits than its factorization.

661148 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165291 (or 165289 counting only the distinct ones).

The product of its digits is 1152, while the sum is 26.

The square root of 661148 is about 813.1100786486. The cubic root of 661148 is about 87.1163282910.

The spelling of 661148 in words is "six hundred sixty-one thousand, one hundred forty-eight".