1666010049 has 16 divisors (see below), whose sum is σ = 2447285184. Its totient is φ = 999704000.

The previous prime is 1666010039. The next prime is 1666010051. The reversal of 1666010049 is 9400106661.

It is a cyclic number.

It is not a de Polignac number, because 1666010049 - 2⁴ = 1666010033 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 (1666010039) 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, 246594 + ... + 253259.

It is an arithmetic number, because the mean of its divisors is an integer number (152955324).

Almost surely, 2^1666010049 is an apocalyptic number.

It is an amenable number.

1666010049 is a deficient number, since it is larger than the sum of its proper divisors (781275135).

1666010049 is a wasteful number, since it uses less digits than its factorization.

1666010049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499968.

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 1666010049 is about 40816.7863629659. The cubic root of 1666010049 is about 1185.4753797795.

The spelling of 1666010049 in words is "one billion, six hundred sixty-six million, ten thousand, forty-nine".