10506665220 has 48 divisors (see below), whose sum is σ = 30967016640. Its totient is φ = 2654315136.

The previous prime is 10506665137. The next prime is 10506665269. The reversal of 10506665220 is 2256660501.

It is a happy number.

It is a super-2 number, since 2×10506665220² (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 15 ways as a sum of consecutive naturals, for example, 4607047 + ... + 4609326.

It is an arithmetic number, because the mean of its divisors is an integer number (645146180).

Almost surely, 2^10506665220 is an apocalyptic number.

10506665220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10506665220 is an abundant number, since it is smaller than the sum of its proper divisors (20460351420).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

10506665220 is a wasteful number, since it uses less digits than its factorization.

10506665220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9216404 (or 9216402 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 33.

The spelling of 10506665220 in words is "ten billion, five hundred six million, six hundred sixty-five thousand, two hundred twenty".