1666372834 has 16 divisors (see below), whose sum is σ = 2857167936. Its totient is φ = 714027600.

The previous prime is 1666372817. The next prime is 1666372871. The reversal of 1666372834 is 4382736661.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 126604 + ... + 139144.

It is an arithmetic number, because the mean of its divisors is an integer number (178572996).

Almost surely, 2^1666372834 is an apocalyptic number.

1666372834 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1666372834 is a deficient number, since it is larger than the sum of its proper divisors (1190795102).

1666372834 is a wasteful number, since it uses less digits than its factorization.

1666372834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22041.

The product of its digits is 870912, while the sum is 46.

The square root of 1666372834 is about 40821.2301872445. The cubic root of 1666372834 is about 1185.5614219721.

The spelling of 1666372834 in words is "one billion, six hundred sixty-six million, three hundred seventy-two thousand, eight hundred thirty-four".