10500005666 has 16 divisors (see below), whose sum is σ = 15824416608. Its totient is φ = 5225220000.

The previous prime is 10500005639. The next prime is 10500005671. The reversal of 10500005666 is 66650000501.

It is a super-2 number, since 2×10500005666² (a number of 21 digits) contains 22 as substring.

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, 1791641 + ... + 1797491.

It is an arithmetic number, because the mean of its divisors is an integer number (989026038).

Almost surely, 2^10500005666 is an apocalyptic number.

10500005666 is a deficient number, since it is larger than the sum of its proper divisors (5324410942).

10500005666 is a wasteful number, since it uses less digits than its factorization.

10500005666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9937.

The product of its (nonzero) digits is 5400, while the sum is 29.

The spelling of 10500005666 in words is "ten billion, five hundred million, five thousand, six hundred sixty-six".