661496 has 16 divisors (see below), whose sum is σ = 1353240. Its totient is φ = 300640.

The previous prime is 661483. The next prime is 661513. The reversal of 661496 is 694166.

It is a congruent number.

It is an unprimeable number.

661496 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3671 + ... + 3846.

2⁶⁶¹⁴⁹⁶ is an apocalyptic number.

It is an amenable number.

661496 is an abundant number, since it is smaller than the sum of its proper divisors (691744).

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

661496 is a wasteful number, since it uses less digits than its factorization.

661496 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7534 (or 7530 counting only the distinct ones).

The product of its digits is 7776, while the sum is 32.

The square root of 661496 is about 813.3240436628. The cubic root of 661496 is about 87.1316103784.

The spelling of 661496 in words is "six hundred sixty-one thousand, four hundred ninety-six".