1666736107 has 4 divisors (see below), whose sum is σ = 1754459080. Its totient is φ = 1579013136.

The previous prime is 1666736081. The next prime is 1666736167. The reversal of 1666736107 is 7016376661.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1666736107 - 2¹¹ = 1666734059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1666736167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43861458 + ... + 43861495.

It is an arithmetic number, because the mean of its divisors is an integer number (438614770).

Almost surely, 2^1666736107 is an apocalyptic number.

1666736107 is a deficient number, since it is larger than the sum of its proper divisors (87722973).

1666736107 is an equidigital number, since it uses as much as digits as its factorization.

1666736107 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87722972.

The product of its (nonzero) digits is 190512, while the sum is 43.

The square root of 1666736107 is about 40825.6795044492. The cubic root of 1666736107 is about 1185.6475673918.

The spelling of 1666736107 in words is "one billion, six hundred sixty-six million, seven hundred thirty-six thousand, one hundred seven".