4061665129 has 4 divisors (see below), whose sum is σ = 4148083584. Its totient is φ = 3975246676.

The previous prime is 4061665103. The next prime is 4061665199. The reversal of 4061665129 is 9215661604.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4061665129 - 2⁷ = 4061665001 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4061665091 and 4061665100.

It is not an unprimeable number, because it can be changed into a prime (4061665199) 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, 43209157 + ... + 43209250.

It is an arithmetic number, because the mean of its divisors is an integer number (1037020896).

Almost surely, 2^4061665129 is an apocalyptic number.

It is an amenable number.

4061665129 is a deficient number, since it is larger than the sum of its proper divisors (86418455).

4061665129 is an equidigital number, since it uses as much as digits as its factorization.

4061665129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86418454.

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 4061665129 is about 63731.1943164413. The cubic root of 4061665129 is about 1595.5167632728.

The spelling of 4061665129 in words is "four billion, sixty-one million, six hundred sixty-five thousand, one hundred twenty-nine".