2545666506 has 24 divisors (see below), whose sum is σ = 5543335200. Its totient is φ = 844290216.

The previous prime is 2545666483. The next prime is 2545666511. The reversal of 2545666506 is 6056665452.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 351760 + ... + 358923.

It is an arithmetic number, because the mean of its divisors is an integer number (230972300).

Almost surely, 2^2545666506 is an apocalyptic number.

2545666506 is an abundant number, since it is smaller than the sum of its proper divisors (2997668694).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2545666506 is a wasteful number, since it uses less digits than its factorization.

2545666506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 710890 (or 710887 counting only the distinct ones).

The product of its (nonzero) digits is 1296000, while the sum is 45.

The square root of 2545666506 is about 50454.5984623800. The cubic root of 2545666506 is about 1365.4228597720.

The spelling of 2545666506 in words is "two billion, five hundred forty-five million, six hundred sixty-six thousand, five hundred six".