540621966 has 16 divisors (see below), whose sum is σ = 1081610064. Its totient is φ = 180146304.

The previous prime is 540621959. The next prime is 540621967. The reversal of 540621966 is 669126045.

It is a super-2 number, since 2×540621966² = 584544220243410312, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (540621967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6280 + ... + 33476.

It is an arithmetic number, because the mean of its divisors is an integer number (67600629).

Almost surely, 2^540621966 is an apocalyptic number.

540621966 is an abundant number, since it is smaller than the sum of its proper divisors (540988098).

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

540621966 is a wasteful number, since it uses less digits than its factorization.

540621966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30515.

The product of its (nonzero) digits is 77760, while the sum is 39.

The square root of 540621966 is about 23251.2788035411. The cubic root of 540621966 is about 814.6378086271.

It can be divided in two parts, 5406 and 21966, that added together give a palindrome (27372).

The spelling of 540621966 in words is "five hundred forty million, six hundred twenty-one thousand, nine hundred sixty-six".