66144142 has 16 divisors (see below), whose sum is σ = 103951872. Its totient is φ = 31525560.

The previous prime is 66144121. The next prime is 66144163. The reversal of 66144142 is 24144166.

It is an interprime number because it is at equal distance from previous prime (66144121) and next prime (66144163).

It is a self number, because there is not a number n which added to its sum of digits gives 66144142.

It is a congruent number.

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, 3808 + ... + 12115.

It is an arithmetic number, because the mean of its divisors is an integer number (6496992).

Almost surely, 2^66144142 is an apocalyptic number.

66144142 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

66144142 is a deficient number, since it is larger than the sum of its proper divisors (37807730).

66144142 is a wasteful number, since it uses less digits than its factorization.

66144142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16023.

The product of its digits is 4608, while the sum is 28.

The square root of 66144142 is about 8132.9048930871. The cubic root of 66144142 is about 404.4179863398.

The spelling of 66144142 in words is "sixty-six million, one hundred forty-four thousand, one hundred forty-two".