1660623 has 16 divisors (see below), whose sum is σ = 2370816. Its totient is φ = 1031360.

The previous prime is 1660609. The next prime is 1660661. The reversal of 1660623 is 3260661.

It is a cyclic number.

It is not a de Polignac number, because 1660623 - 2⁶ = 1660559 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1660593 and 1660602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1660663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2536 + ... + 3122.

It is an arithmetic number, because the mean of its divisors is an integer number (148176).

2^1660623 is an apocalyptic number.

1660623 is a deficient number, since it is larger than the sum of its proper divisors (710193).

1660623 is a wasteful number, since it uses less digits than its factorization.

1660623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 654.

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 1660623 is about 1288.6516208813. The cubic root of 1660623 is about 118.4196253915.

The spelling of 1660623 in words is "one million, six hundred sixty thousand, six hundred twenty-three".