66542614 has 4 divisors (see below), whose sum is σ = 99813924. Its totient is φ = 33271306.

The previous prime is 66542603. The next prime is 66542621. The reversal of 66542614 is 41624566.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 66542614.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16635652 + ... + 16635655.

It is an arithmetic number, because the mean of its divisors is an integer number (24953481).

Almost surely, 2^66542614 is an apocalyptic number.

66542614 is a deficient number, since it is larger than the sum of its proper divisors (33271310).

66542614 is a wasteful number, since it uses less digits than its factorization.

66542614 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33271309.

The product of its digits is 34560, while the sum is 34.

The square root of 66542614 is about 8157.3656286818. The cubic root of 66542614 is about 405.2284724188.

The spelling of 66542614 in words is "sixty-six million, five hundred forty-two thousand, six hundred fourteen".