540621371666 has 16 divisors (see below), whose sum is σ = 847176599808. Its totient is φ = 258439285200.

The previous prime is 540621371659. The next prime is 540621371681. The reversal of 540621371666 is 666173126045.

It is a self number, because there is not a number n which added to its sum of digits gives 540621371666.

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, 52523165 + ... + 52533456.

It is an arithmetic number, because the mean of its divisors is an integer number (52948537488).

Almost surely, 2^540621371666 is an apocalyptic number.

540621371666 is a deficient number, since it is larger than the sum of its proper divisors (306555228142).

540621371666 is a wasteful number, since it uses less digits than its factorization.

540621371666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105056737.

The product of its (nonzero) digits is 1088640, while the sum is 47.

The spelling of 540621371666 in words is "five hundred forty billion, six hundred twenty-one million, three hundred seventy-one thousand, six hundred sixty-six".