1666003153 has 8 divisors (see below), whose sum is σ = 1691898408. Its totient is φ = 1640191104.

The previous prime is 1666003127. The next prime is 1666003211. The reversal of 1666003153 is 3513006661.

It can be written as a sum of positive squares in 4 ways, for example, as 400920529 + 1265082624 = 20023^2 + 35568^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1666003153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1666003103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20175 + ... + 61147.

It is an arithmetic number, because the mean of its divisors is an integer number (211487301).

Almost surely, 2^1666003153 is an apocalyptic number.

It is an amenable number.

1666003153 is a deficient number, since it is larger than the sum of its proper divisors (25895255).

1666003153 is an equidigital number, since it uses as much as digits as its factorization.

1666003153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41603.

The product of its (nonzero) digits is 9720, while the sum is 31.

The square root of 1666003153 is about 40816.7018878302. The cubic root of 1666003153 is about 1185.4737441252.

The spelling of 1666003153 in words is "one billion, six hundred sixty-six million, three thousand, one hundred fifty-three".