1666503142 has 8 divisors (see below), whose sum is σ = 2510483976. Its totient is φ = 829675152.

The previous prime is 1666503101. The next prime is 1666503161. The reversal of 1666503142 is 2413056661.

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

It is a junction number, because it is equal to n+sod(n) for n = 1666503098 and 1666503107.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1787628 + ... + 1788559.

It is an arithmetic number, because the mean of its divisors is an integer number (313810497).

Almost surely, 2^1666503142 is an apocalyptic number.

1666503142 is a deficient number, since it is larger than the sum of its proper divisors (843980834).

1666503142 is a wasteful number, since it uses less digits than its factorization.

1666503142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3576422.

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 1666503142 is about 40822.8262372903. The cubic root of 1666503142 is about 1185.5923242423.

The spelling of 1666503142 in words is "one billion, six hundred sixty-six million, five hundred three thousand, one hundred forty-two".