1666666703 has 8 divisors (see below), whose sum is σ = 1801548000. Its totient is φ = 1532739168.

The previous prime is 1666666693. The next prime is 1666666711. The reversal of 1666666703 is 3076666661.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1666666703 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1666666753) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 234803 + ... + 241796.

It is an arithmetic number, because the mean of its divisors is an integer number (225193500).

Almost surely, 2^1666666703 is an apocalyptic number.

1666666703 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1666666703 is a deficient number, since it is larger than the sum of its proper divisors (134881297).

1666666703 is a wasteful number, since it uses less digits than its factorization.

1666666703 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 476881.

The product of its (nonzero) digits is 979776, while the sum is 47.

The square root of 1666666703 is about 40824.8294913769. The cubic root of 1666666703 is about 1185.6311101123.

The spelling of 1666666703 in words is "one billion, six hundred sixty-six million, six hundred sixty-six thousand, seven hundred three".