1666166703 has 32 divisors (see below), whose sum is σ = 2321510400. Its totient is φ = 1061786880.

The previous prime is 1666166701. The next prime is 1666166773. The reversal of 1666166703 is 3076616661.

It is not a de Polignac number, because 1666166703 - 2¹ = 1666166701 is a prime.

It is a super-2 number, since 2×1666166703² = 5552222964371780418, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1666166701) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3645651 + ... + 3646107.

It is an arithmetic number, because the mean of its divisors is an integer number (72547200).

Almost surely, 2^1666166703 is an apocalyptic number.

1666166703 is a deficient number, since it is larger than the sum of its proper divisors (655343697).

1666166703 is a wasteful number, since it uses less digits than its factorization.

1666166703 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 887.

The product of its (nonzero) digits is 163296, while the sum is 42.

The square root of 1666166703 is about 40818.7053077385. The cubic root of 1666166703 is about 1185.5125351456.

The spelling of 1666166703 in words is "one billion, six hundred sixty-six million, one hundred sixty-six thousand, seven hundred three".