661048 has 16 divisors (see below), whose sum is σ = 1305000. Its totient is φ = 313056.

The previous prime is 661027. The next prime is 661049. The reversal of 661048 is 840166.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (661049) 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, 2023 + ... + 2326.

2⁶⁶¹⁰⁴⁸ is an apocalyptic number.

It is an amenable number.

661048 is a deficient number, since it is larger than the sum of its proper divisors (643952).

661048 is a wasteful number, since it uses less digits than its factorization.

661048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4374 (or 4370 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 661048 is about 813.0485840342. The cubic root of 661048 is about 87.1119358947. Note that the first 3 decimals are identical.

The spelling of 661048 in words is "six hundred sixty-one thousand, forty-eight".