66022140 has 48 divisors (see below), whose sum is σ = 185220000. Its totient is φ = 17571840.

The previous prime is 66022133. The next prime is 66022141. The reversal of 66022140 is 4122066.

It is a happy number.

66022140 is a modest number, since divided by 22140 gives 660 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66022141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52236 + ... + 53484.

It is an arithmetic number, because the mean of its divisors is an integer number (3858750).

Almost surely, 2^66022140 is an apocalyptic number.

66022140 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66022140 is an abundant number, since it is smaller than the sum of its proper divisors (119197860).

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

66022140 is a wasteful number, since it uses less digits than its factorization.

66022140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2142 (or 2140 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 66022140 is about 8125.4009131858. The cubic root of 66022140 is about 404.1691854214.

The spelling of 66022140 in words is "sixty-six million, twenty-two thousand, one hundred forty".