661035 has 16 divisors (see below), whose sum is σ = 1069056. Its totient is φ = 348768.

The previous prime is 661027. The next prime is 661049. The reversal of 661035 is 530166.

It is not a de Polignac number, because 661035 - 2³ = 661027 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1732 + ... + 2078.

It is an arithmetic number, because the mean of its divisors is an integer number (66816).

2⁶⁶¹⁰³⁵ is an apocalyptic number.

661035 is a deficient number, since it is larger than the sum of its proper divisors (408021).

661035 is a wasteful number, since it uses less digits than its factorization.

661035 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 482.

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 661035 is about 813.0405893927. The cubic root of 661035 is about 87.1113648506. Note that the first 3 decimals are identical.

The spelling of 661035 in words is "six hundred sixty-one thousand, thirty-five".