6645425601 has 8 divisors (see below), whose sum is σ = 8906477920. Its totient is φ = 4407328512.

The previous prime is 6645425599. The next prime is 6645425621. The reversal of 6645425601 is 1065245466.

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

It is not a de Polignac number, because 6645425601 - 2¹ = 6645425599 is a prime.

It is a super-2 number, since 2×6645425601² = 88323362836852422402, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6645425601.

It is not an unprimeable number, because it can be changed into a prime (6645425621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5738131 + ... + 5739288.

It is an arithmetic number, because the mean of its divisors is an integer number (1113309740).

Almost surely, 2^6645425601 is an apocalyptic number.

It is an amenable number.

6645425601 is a deficient number, since it is larger than the sum of its proper divisors (2261052319).

6645425601 is a wasteful number, since it uses less digits than its factorization.

6645425601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11477615.

The product of its (nonzero) digits is 172800, while the sum is 39.

The square root of 6645425601 is about 81519.4798867117. The cubic root of 6645425601 is about 1880.0710702912.

The spelling of 6645425601 in words is "six billion, six hundred forty-five million, four hundred twenty-five thousand, six hundred one".