2506156406566 has 8 divisors (see below), whose sum is σ = 3759324150024. Its totient is φ = 1253048356560.

The previous prime is 2506156406563. The next prime is 2506156406603. The reversal of 2506156406566 is 6656046516052.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2506156406561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14818255 + ... + 14986426.

It is an arithmetic number, because the mean of its divisors is an integer number (469915518753).

Almost surely, 2^{2506156406566} is an apocalyptic number.

2506156406566 is a deficient number, since it is larger than the sum of its proper divisors (1253167743458).

2506156406566 is a wasteful number, since it uses less digits than its factorization.

2506156406566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29846726.

The product of its (nonzero) digits is 7776000, while the sum is 52.

The spelling of 2506156406566 in words is "two trillion, five hundred six billion, one hundred fifty-six million, four hundred six thousand, five hundred sixty-six".