1666013043 has 16 divisors (see below), whose sum is σ = 2350149120. Its totient is φ = 1046870496.

The previous prime is 1666013021. The next prime is 1666013053. The reversal of 1666013043 is 3403106661.

It is not a de Polignac number, because 1666013043 - 2⁶ = 1666012979 is a prime.

It is a super-2 number, since 2×1666013043² = 5551198918892239698, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1666013043.

It is not an unprimeable number, because it can be changed into a prime (1666013003) 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, 62955 + ... + 85412.

It is an arithmetic number, because the mean of its divisors is an integer number (146884320).

Almost surely, 2^1666013043 is an apocalyptic number.

1666013043 is a deficient number, since it is larger than the sum of its proper divisors (684136077).

1666013043 is a wasteful number, since it uses less digits than its factorization.

1666013043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148586.

The product of its (nonzero) digits is 7776, while the sum is 30.

The square root of 1666013043 is about 40816.8230390362. The cubic root of 1666013043 is about 1185.4760899215.

The spelling of 1666013043 in words is "one billion, six hundred sixty-six million, thirteen thousand, forty-three".