661036 has 12 divisors (see below), whose sum is σ = 1176840. Its totient is φ = 324800.

The previous prime is 661027. The next prime is 661049. The reversal of 661036 is 630166.

It is a junction number, because it is equal to n+sod(n) for n = 660998 and 661016.

It is an unprimeable number.

661036 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 in 3 ways as a sum of consecutive naturals, for example, 1165 + ... + 1636.

It is an arithmetic number, because the mean of its divisors is an integer number (98070).

2⁶⁶¹⁰³⁶ is an apocalyptic number.

It is an amenable number.

661036 is a deficient number, since it is larger than the sum of its proper divisors (515804).

661036 is a wasteful number, since it uses less digits than its factorization.

661036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2864 (or 2862 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 661036 is about 813.0412043679. The cubic root of 661036 is about 87.1114087773. Note that the first 3 decimals are identical.

The spelling of 661036 in words is "six hundred sixty-one thousand, thirty-six".