1666410603 has 16 divisors (see below), whose sum is σ = 2610322176. Its totient is φ = 932257440.

The previous prime is 1666410593. The next prime is 1666410607. The reversal of 1666410603 is 3060146661.

It is not a de Polignac number, because 1666410603 - 2⁴ = 1666410587 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (1666410607) 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, 1941775 + ... + 1942632.

It is an arithmetic number, because the mean of its divisors is an integer number (163145136).

Almost surely, 2^1666410603 is an apocalyptic number.

1666410603 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1666410603 is a deficient number, since it is larger than the sum of its proper divisors (943911573).

1666410603 is a wasteful number, since it uses less digits than its factorization.

1666410603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3884434.

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 1666410603 is about 40821.6927992948. The cubic root of 1666410603 is about 1185.5703789774.

The spelling of 1666410603 in words is "one billion, six hundred sixty-six million, four hundred ten thousand, six hundred three".