2660816081850 has 48 divisors (see below), whose sum is σ = 6986990000448. Its totient is φ = 667812663040.

The previous prime is 2660816081843. The next prime is 2660816081857. The reversal of 2660816081850 is 581806180662.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2660816081843) and next prime (2660816081857).

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a junction number, because it is equal to n+sod(n) for n = 2660816081793 and 2660816081802.

It is not an unprimeable number, because it can be changed into a prime (2660816081857) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 521726094 + ... + 521731193.

It is an arithmetic number, because the mean of its divisors is an integer number (145562291676).

Almost surely, 2^{2660816081850} is an apocalyptic number.

2660816081850 is an abundant number, since it is smaller than the sum of its proper divisors (4326173918598).

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

2660816081850 is a wasteful number, since it uses less digits than its factorization.

2660816081850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1043457319 (or 1043457314 counting only the distinct ones).

The product of its (nonzero) digits is 1105920, while the sum is 51.

The spelling of 2660816081850 in words is "two trillion, six hundred sixty billion, eight hundred sixteen million, eighty-one thousand, eight hundred fifty".