122065661 has 4 divisors (see below), whose sum is σ = 129246012. Its totient is φ = 114885312.

The previous prime is 122065639. The next prime is 122065663. The reversal of 122065661 is 166560221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 166560221 = 281 ⋅592741.

It can be written as a sum of positive squares in 2 ways, for example, as 112763161 + 9302500 = 10619^2 + 3050^2 .

It is a cyclic number.

It is not a de Polignac number, because 122065661 - 2⁶ = 122065597 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 (122065663) 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, 3590150 + ... + 3590183.

It is an arithmetic number, because the mean of its divisors is an integer number (32311503).

Almost surely, 2^122065661 is an apocalyptic number.

It is an amenable number.

122065661 is a deficient number, since it is larger than the sum of its proper divisors (7180351).

122065661 is an equidigital number, since it uses as much as digits as its factorization.

122065661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7180350.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 122065661 is about 11048.3329511741. The cubic root of 122065661 is about 496.0565278208.

The spelling of 122065661 in words is "one hundred twenty-two million, sixty-five thousand, six hundred sixty-one".