66542141 has 8 divisors (see below), whose sum is σ = 67079040. Its totient is φ = 66007872.

The previous prime is 66542137. The next prime is 66542143. The reversal of 66542141 is 14124566.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66542141 - 2² = 66542137 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66542143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103166 + ... + 103808.

It is an arithmetic number, because the mean of its divisors is an integer number (8384880).

Almost surely, 2^66542141 is an apocalyptic number.

It is an amenable number.

66542141 is a deficient number, since it is larger than the sum of its proper divisors (536899).

66542141 is a wasteful number, since it uses less digits than its factorization.

66542141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1315.

The product of its digits is 5760, while the sum is 29.

The square root of 66542141 is about 8157.3366364274. The cubic root of 66542141 is about 405.2275122646.

The spelling of 66542141 in words is "sixty-six million, five hundred forty-two thousand, one hundred forty-one".