661484 has 12 divisors (see below), whose sum is σ = 1177008. Its totient is φ = 325200.

The previous prime is 661483. The next prime is 661513. The reversal of 661484 is 484166.

661484 = T₃₇ + T₃₈ + ... + T₁₅₈.

It is a super-2 number, since 2×661484² = 875122164512, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (661481) by changing a digit.

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, 1112 + ... + 1599.

It is an arithmetic number, because the mean of its divisors is an integer number (98084).

2⁶⁶¹⁴⁸⁴ is an apocalyptic number.

It is an amenable number.

661484 is a deficient number, since it is larger than the sum of its proper divisors (515524).

661484 is a wasteful number, since it uses less digits than its factorization.

661484 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2776 (or 2774 counting only the distinct ones).

The product of its digits is 4608, while the sum is 29.

The square root of 661484 is about 813.3166664959. The cubic root of 661484 is about 87.1310834991.

The spelling of 661484 in words is "six hundred sixty-one thousand, four hundred eighty-four".