166069983 has 4 divisors (see below), whose sum is σ = 221426648. Its totient is φ = 110713320.

The previous prime is 166069973. The next prime is 166069993. The reversal of 166069983 is 389960661.

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

It is an interprime number because it is at equal distance from previous prime (166069973) and next prime (166069993).

It is not a de Polignac number, because 166069983 - 2¹⁷ = 165938911 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 (166069933) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27678328 + ... + 27678333.

It is an arithmetic number, because the mean of its divisors is an integer number (55356662).

Almost surely, 2^166069983 is an apocalyptic number.

166069983 is a deficient number, since it is larger than the sum of its proper divisors (55356665).

166069983 is an equidigital number, since it uses as much as digits as its factorization.

166069983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55356664.

The product of its (nonzero) digits is 419904, while the sum is 48.

The square root of 166069983 is about 12886.8143076557. The cubic root of 166069983 is about 549.6636875074.

The spelling of 166069983 in words is "one hundred sixty-six million, sixty-nine thousand, nine hundred eighty-three".