10500661255466 has 16 divisors (see below), whose sum is σ = 15775939650240. Its totient is φ = 5242015096320.

The previous prime is 10500661255463. The next prime is 10500661255477. The reversal of 10500661255466 is 66455216600501.

It is a super-3 number, since 3×10500661255466³ (a number of 40 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 10500661255466.

It is not an unprimeable number, because it can be changed into a prime (10500661255463) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78621155 + ... + 78754601.

It is an arithmetic number, because the mean of its divisors is an integer number (985996228140).

Almost surely, 2^{10500661255466} is an apocalyptic number.

10500661255466 is a deficient number, since it is larger than the sum of its proper divisors (5275278394774).

10500661255466 is a wasteful number, since it uses less digits than its factorization.

10500661255466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195469.

The product of its (nonzero) digits is 1296000, while the sum is 47.

Adding to 10500661255466 its reverse (66455216600501), we get a palindrome (76955877855967).

The spelling of 10500661255466 in words is "ten trillion, five hundred billion, six hundred sixty-one million, two hundred fifty-five thousand, four hundred sixty-six".