6642461625 has 32 divisors (see below), whose sum is σ = 11204514048. Its totient is φ = 3494102400.

The previous prime is 6642461621. The next prime is 6642461633. The reversal of 6642461625 is 5261642466.

It is not a de Polignac number, because 6642461625 - 2² = 6642461621 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6642461621) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 93949 + ... + 148698.

It is an arithmetic number, because the mean of its divisors is an integer number (350141064).

Almost surely, 2^6642461625 is an apocalyptic number.

It is an amenable number.

6642461625 is a deficient number, since it is larger than the sum of its proper divisors (4562052423).

6642461625 is a wasteful number, since it uses less digits than its factorization.

6642461625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242738 (or 242728 counting only the distinct ones).

The product of its digits is 414720, while the sum is 42.

The square root of 6642461625 is about 81501.2983025424. The cubic root of 6642461625 is about 1879.7915138692.

The spelling of 6642461625 in words is "six billion, six hundred forty-two million, four hundred sixty-one thousand, six hundred twenty-five".