1361666 has 16 divisors (see below), whose sum is σ = 2238840. Its totient is φ = 618240.

The previous prime is 1361629. The next prime is 1361677. The reversal of 1361666 is 6661631.

It can be written as a sum of positive squares in 4 ways, for example, as 1274641 + 87025 = 1129^2 + 295^2 .

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Curzon number.

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, 296 + ... + 1676.

2^1361666 is an apocalyptic number.

1361666 is a deficient number, since it is larger than the sum of its proper divisors (877174).

1361666 is a wasteful number, since it uses less digits than its factorization.

1361666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1429.

The product of its digits is 3888, while the sum is 29.

The square root of 1361666 is about 1166.9044519583. The cubic root of 1361666 is about 110.8383872169.

It can be divided in two parts, 136 and 1666, that multiplied together give a square (226576 = 476²).

The spelling of 1361666 in words is "one million, three hundred sixty-one thousand, six hundred sixty-six".