6620510661425 has 24 divisors (see below), whose sum is σ = 8218427632800. Its totient is φ = 5290607030400.

The previous prime is 6620510661419. The next prime is 6620510661433. The reversal of 6620510661425 is 5241660150266.

It is not a de Polignac number, because 6620510661425 - 2¹⁶ = 6620510595889 is a prime.

It is a super-2 number, since 2×6620510661425² (a number of 26 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 338271890 + ... + 338291460.

It is an arithmetic number, because the mean of its divisors is an integer number (342434484700).

Almost surely, 2^{6620510661425} is an apocalyptic number.

It is an amenable number.

6620510661425 is a deficient number, since it is larger than the sum of its proper divisors (1597916971375).

6620510661425 is a wasteful number, since it uses less digits than its factorization.

6620510661425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33713 (or 33708 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 44.

The spelling of 6620510661425 in words is "six trillion, six hundred twenty billion, five hundred ten million, six hundred sixty-one thousand, four hundred twenty-five".