122651661 has 16 divisors (see below), whose sum is σ = 178933248. Its totient is φ = 74113200.

The previous prime is 122651657. The next prime is 122651671. The reversal of 122651661 is 166156221.

It is not a de Polignac number, because 122651661 - 2² = 122651657 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122651611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6096 + ... + 16806.

It is an arithmetic number, because the mean of its divisors is an integer number (11183328).

Almost surely, 2^122651661 is an apocalyptic number.

122651661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

122651661 is a deficient number, since it is larger than the sum of its proper divisors (56281587).

122651661 is a wasteful number, since it uses less digits than its factorization.

122651661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11072.

The product of its digits is 4320, while the sum is 30.

The square root of 122651661 is about 11074.8210369288. The cubic root of 122651661 is about 496.8490662783.

The spelling of 122651661 in words is "one hundred twenty-two million, six hundred fifty-one thousand, six hundred sixty-one".