661038 has 16 divisors (see below), whose sum is σ = 1511040. Its totient is φ = 188856.

The previous prime is 661027. The next prime is 661049. The reversal of 661038 is 830166.

It is an interprime number because it is at equal distance from previous prime (661027) and next prime (661049).

It is a junction number, because it is equal to n+sod(n) for n = 660999 and 661017.

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 661038.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7828 + ... + 7911.

It is an arithmetic number, because the mean of its divisors is an integer number (94440).

2⁶⁶¹⁰³⁸ is an apocalyptic number.

661038 is an abundant number, since it is smaller than the sum of its proper divisors (850002).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

661038 is a wasteful number, since it uses less digits than its factorization.

661038 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15751.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 661038 is about 813.0424343169. The cubic root of 661038 is about 87.1114966307. Note that the first 3 decimals are identical.

The spelling of 661038 in words is "six hundred sixty-one thousand, thirty-eight".