1666132623 has 12 divisors (see below), whose sum is σ = 2407787928. Its totient is φ = 1110223440.

The previous prime is 1666132619. The next prime is 1666132669. The reversal of 1666132623 is 3262316661.

It is not a de Polignac number, because 1666132623 - 2² = 1666132619 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1666132613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23965 + ... + 62502.

It is an arithmetic number, because the mean of its divisors is an integer number (200648994).

Almost surely, 2^1666132623 is an apocalyptic number.

1666132623 is a deficient number, since it is larger than the sum of its proper divisors (741655305).

1666132623 is a wasteful number, since it uses less digits than its factorization.

1666132623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88614 (or 88611 counting only the distinct ones).

The product of its digits is 46656, while the sum is 36.

The square root of 1666132623 is about 40818.2878499331. The cubic root of 1666132623 is about 1185.5044522123.

It can be divided in two parts, 16661 and 32623, that added together give a square (49284 = 222²).

The spelling of 1666132623 in words is "one billion, six hundred sixty-six million, one hundred thirty-two thousand, six hundred twenty-three".