661914 has 24 divisors (see below), whose sum is σ = 1564992. Its totient is φ = 200520.

The previous prime is 661909. The next prime is 661931. The reversal of 661914 is 419166.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1474 + ... + 1869.

It is an arithmetic number, because the mean of its divisors is an integer number (65208).

2⁶⁶¹⁹¹⁴ is an apocalyptic number.

661914 is an abundant number, since it is smaller than the sum of its proper divisors (903078).

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

661914 is a wasteful number, since it uses less digits than its factorization.

661914 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3362 (or 3359 counting only the distinct ones).

The product of its digits is 1296, while the sum is 27.

The square root of 661914 is about 813.5809732288. The cubic root of 661914 is about 87.1499593654.

The spelling of 661914 in words is "six hundred sixty-one thousand, nine hundred fourteen".