4065720657 has 8 divisors (see below), whose sum is σ = 5433199584. Its totient is φ = 2704361088.

The previous prime is 4065720653. The next prime is 4065720689. The reversal of 4065720657 is 7560275604.

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

It is not a de Polignac number, because 4065720657 - 2² = 4065720653 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4065720653) 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, 1528288 + ... + 1530945.

It is an arithmetic number, because the mean of its divisors is an integer number (679149948).

Almost surely, 2^4065720657 is an apocalyptic number.

It is an amenable number.

4065720657 is a deficient number, since it is larger than the sum of its proper divisors (1367478927).

4065720657 is a wasteful number, since it uses less digits than its factorization.

4065720657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3059679.

The product of its (nonzero) digits is 352800, while the sum is 42.

The square root of 4065720657 is about 63763.0038266705. The cubic root of 4065720657 is about 1596.0476219451.

The spelling of 4065720657 in words is "four billion, sixty-five million, seven hundred twenty thousand, six hundred fifty-seven".