6625660001 has 8 divisors (see below), whose sum is σ = 6641735208. Its totient is φ = 6609600000.

The previous prime is 6625659961. The next prime is 6625660061. The reversal of 6625660001 is 1000665266.

It can be written as a sum of positive squares in 4 ways, for example, as 708358225 + 5917301776 = 26615^2 + 76924^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 6625660001 - 2²⁶ = 6558551137 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 6625660001.

It is not an unprimeable number, because it can be changed into a prime (6625660061) 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, 1654001 + ... + 1658001.

It is an arithmetic number, because the mean of its divisors is an integer number (830216901).

Almost surely, 2^6625660001 is an apocalyptic number.

It is an amenable number.

6625660001 is a deficient number, since it is larger than the sum of its proper divisors (16075207).

6625660001 is a wasteful number, since it uses less digits than its factorization.

6625660001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7603.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 6625660001 is about 81398.1572334411. The cubic root of 6625660001 is about 1878.2052436522.

The spelling of 6625660001 in words is "six billion, six hundred twenty-five million, six hundred sixty thousand, one".