166500651 has 4 divisors (see below), whose sum is σ = 222000872. Its totient is φ = 111000432.

The previous prime is 166500647. The next prime is 166500671. The reversal of 166500651 is 156005661.

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

It is not a de Polignac number, because 166500651 - 2² = 166500647 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166500671) 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, 27750106 + ... + 27750111.

It is an arithmetic number, because the mean of its divisors is an integer number (55500218).

Almost surely, 2^166500651 is an apocalyptic number.

166500651 is a deficient number, since it is larger than the sum of its proper divisors (55500221).

166500651 is an equidigital number, since it uses as much as digits as its factorization.

166500651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55500220.

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 166500651 is about 12903.5131262769. The cubic root of 166500651 is about 550.1384235609.

The spelling of 166500651 in words is "one hundred sixty-six million, five hundred thousand, six hundred fifty-one".