1661076 has 18 divisors (see below), whose sum is σ = 4198922. Its totient is φ = 553680.

The previous prime is 1661069. The next prime is 1661111. The reversal of 1661076 is 6701661.

It can be written as a sum of positive squares in only one way, i.e., 1052676 + 608400 = 1026^2 + 780^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 23035 + ... + 23106.

2^1661076 is an apocalyptic number.

It is an amenable number.

1661076 is an abundant number, since it is smaller than the sum of its proper divisors (2537846).

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

1661076 is a wasteful number, since it uses less digits than its factorization.

1661076 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46151 (or 46146 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 1661076 is about 1288.8273740110. The cubic root of 1661076 is about 118.4303922770.

The spelling of 1661076 in words is "one million, six hundred sixty-one thousand, seventy-six".