166980767 has 4 divisors (see below), whose sum is σ = 167010360. Its totient is φ = 166951176.

The previous prime is 166980763. The next prime is 166980769. The reversal of 166980767 is 767089661.

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 166980767 - 2² = 166980763 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 (166980761) 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, 3413 + ... + 18590.

It is an arithmetic number, because the mean of its divisors is an integer number (41752590).

Almost surely, 2^166980767 is an apocalyptic number.

166980767 is a deficient number, since it is larger than the sum of its proper divisors (29593).

166980767 is an equidigital number, since it uses as much as digits as its factorization.

166980767 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29592.

The product of its (nonzero) digits is 762048, while the sum is 50.

The square root of 166980767 is about 12922.1038147819. The cubic root of 166980767 is about 550.6667033494. Note that the first 3 decimals are identical.

The spelling of 166980767 in words is "one hundred sixty-six million, nine hundred eighty thousand, seven hundred sixty-seven".