906566646651 has 16 divisors (see below), whose sum is σ = 1297391112864. Its totient is φ = 561033990144.

The previous prime is 906566646619. The next prime is 906566646659. The reversal of 906566646651 is 156646665609.

It is not a de Polignac number, because 906566646651 - 2⁵ = 906566646619 is a prime.

It is not an unprimeable number, because it can be changed into a prime (906566646659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 121748446 + ... + 121755891.

It is an arithmetic number, because the mean of its divisors is an integer number (81086944554).

Almost surely, 2^906566646651 is an apocalyptic number.

906566646651 is a deficient number, since it is larger than the sum of its proper divisors (390824466213).

906566646651 is a wasteful number, since it uses less digits than its factorization.

906566646651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243504430.

The product of its (nonzero) digits is 41990400, while the sum is 60.

The spelling of 906566646651 in words is "nine hundred six billion, five hundred sixty-six million, six hundred forty-six thousand, six hundred fifty-one".