166505662 has 4 divisors (see below), whose sum is σ = 249758496. Its totient is φ = 83252830.

The previous prime is 166505639. The next prime is 166505663. The reversal of 166505662 is 266505661.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166505663) 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 as a sum of consecutive naturals, namely, 41626414 + ... + 41626417.

It is an arithmetic number, because the mean of its divisors is an integer number (62439624).

Almost surely, 2^166505662 is an apocalyptic number.

166505662 is a deficient number, since it is larger than the sum of its proper divisors (83252834).

166505662 is an equidigital number, since it uses as much as digits as its factorization.

166505662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83252833.

The product of its (nonzero) digits is 64800, while the sum is 37.

The square root of 166505662 is about 12903.7072967423. The cubic root of 166505662 is about 550.1439424903.

Subtracting 166505662 from its reverse (266505661), we obtain a palindrome (99999999).

The spelling of 166505662 in words is "one hundred sixty-six million, five hundred five thousand, six hundred sixty-two".