1666602 has 32 divisors (see below), whose sum is σ = 4233600. Its totient is φ = 476064.

The previous prime is 1666597. The next prime is 1666607. The reversal of 1666602 is 2066661.

It is an interprime number because it is at equal distance from previous prime (1666597) and next prime (1666607).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1666607) 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 15 ways as a sum of consecutive naturals, for example, 1827 + ... + 2582.

It is an arithmetic number, because the mean of its divisors is an integer number (132300).

2^1666602 is an apocalyptic number.

1666602 is an abundant number, since it is smaller than the sum of its proper divisors (2566998).

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

1666602 is a wasteful number, since it uses less digits than its factorization.

1666602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4427 (or 4421 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 1666602 is about 1290.9694032006. The cubic root of 1666602 is about 118.5615767136.

The spelling of 1666602 in words is "one million, six hundred sixty-six thousand, six hundred two".