1006556663265 has 16 divisors (see below), whose sum is σ = 1617173200896. Its totient is φ = 534602707200.

The previous prime is 1006556663263. The next prime is 1006556663269. The reversal of 1006556663265 is 5623666556001.

It is not a de Polignac number, because 1006556663265 - 2¹ = 1006556663263 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1006556663263) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 139215841 + ... + 139223070.

It is an arithmetic number, because the mean of its divisors is an integer number (101073325056).

Almost surely, 2^{1006556663265} is an apocalyptic number.

1006556663265 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1006556663265 is a deficient number, since it is larger than the sum of its proper divisors (610616537631).

1006556663265 is a wasteful number, since it uses less digits than its factorization.

1006556663265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278439160.

The product of its (nonzero) digits is 5832000, while the sum is 51.

The spelling of 1006556663265 in words is "one trillion, six billion, five hundred fifty-six million, six hundred sixty-three thousand, two hundred sixty-five".