2506656510066 has 16 divisors (see below), whose sum is σ = 5041320357600. Its totient is φ = 830884280448.

The previous prime is 2506656509909. The next prime is 2506656510131. The reversal of 2506656510066 is 6600156566052.

It is a junction number, because it is equal to n+sod(n) for n = 2506656509997 and 2506656510024.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1166971231 + ... + 1166973378.

It is an arithmetic number, because the mean of its divisors is an integer number (315082522350).

Almost surely, 2^{2506656510066} is an apocalyptic number.

2506656510066 is an abundant number, since it is smaller than the sum of its proper divisors (2534663847534).

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

2506656510066 is a wasteful number, since it uses less digits than its factorization.

2506656510066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2333944793.

The product of its (nonzero) digits is 1944000, while the sum is 48.

The spelling of 2506656510066 in words is "two trillion, five hundred six billion, six hundred fifty-six million, five hundred ten thousand, sixty-six".