118066721 has 4 divisors (see below), whose sum is σ = 118162500. Its totient is φ = 117970944.

The previous prime is 118066699. The next prime is 118066723. The reversal of 118066721 is 127660811.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 127660811 = 2749 ⋅46439.

It can be written as a sum of positive squares in 2 ways, for example, as 49773025 + 68293696 = 7055^2 + 8264^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-118066721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (118066723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46016 + ... + 48513.

It is an arithmetic number, because the mean of its divisors is an integer number (29540625).

Almost surely, 2^118066721 is an apocalyptic number.

It is an amenable number.

118066721 is a deficient number, since it is larger than the sum of its proper divisors (95779).

118066721 is an equidigital number, since it uses as much as digits as its factorization.

118066721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95778.

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 118066721 is about 10865.8511401546. The cubic root of 118066721 is about 490.5792414138.

The spelling of 118066721 in words is "one hundred eighteen million, sixty-six thousand, seven hundred twenty-one".