1666303527 has 16 divisors (see below), whose sum is σ = 2544445440. Its totient is φ = 950179872.

The previous prime is 1666303493. The next prime is 1666303531. The reversal of 1666303527 is 7253036661.

It is a de Polignac number, because none of the positive numbers 2^k-1666303527 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1666303567) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72768 + ... + 92885.

It is an arithmetic number, because the mean of its divisors is an integer number (159027840).

Almost surely, 2^1666303527 is an apocalyptic number.

1666303527 is a deficient number, since it is larger than the sum of its proper divisors (878141913).

1666303527 is a wasteful number, since it uses less digits than its factorization.

1666303527 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166142.

The product of its (nonzero) digits is 136080, while the sum is 39.

The square root of 1666303527 is about 40820.3812696550. The cubic root of 1666303527 is about 1185.5449853053.

The spelling of 1666303527 in words is "one billion, six hundred sixty-six million, three hundred three thousand, five hundred twenty-seven".