4265663721 has 8 divisors (see below), whose sum is σ = 6204601824. Its totient is φ = 2585250720.

The previous prime is 4265663707. The next prime is 4265663747. The reversal of 4265663721 is 1273665624.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 4265663721 - 2²¹ = 4263566569 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (4265663771) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64631236 + ... + 64631301.

It is an arithmetic number, because the mean of its divisors is an integer number (775575228).

Almost surely, 2^4265663721 is an apocalyptic number.

It is an amenable number.

4265663721 is a deficient number, since it is larger than the sum of its proper divisors (1938938103).

4265663721 is a wasteful number, since it uses less digits than its factorization.

4265663721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129262551.

The product of its digits is 362880, while the sum is 42.

The square root of 4265663721 is about 65312.0488194942. The cubic root of 4265663721 is about 1621.7934363993.

The spelling of 4265663721 in words is "four billion, two hundred sixty-five million, six hundred sixty-three thousand, seven hundred twenty-one".