65666542 has 8 divisors (see below), whose sum is σ = 99420696. Its totient is φ = 32526312.

The previous prime is 65666537. The next prime is 65666591. The reversal of 65666542 is 24566656.

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

It is a junction number, because it is equal to n+sod(n) for n = 65666495 and 65666504.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 153213 + ... + 153640.

It is an arithmetic number, because the mean of its divisors is an integer number (12427587).

Almost surely, 2^65666542 is an apocalyptic number.

65666542 is a deficient number, since it is larger than the sum of its proper divisors (33754154).

65666542 is a wasteful number, since it uses less digits than its factorization.

65666542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306962.

The product of its digits is 259200, while the sum is 40.

The square root of 65666542 is about 8103.4894952730. The cubic root of 65666542 is about 403.4422547316.

It can be divided in two parts, 6566654 and 2, that added together give a palindrome (6566656).

The spelling of 65666542 in words is "sixty-five million, six hundred sixty-six thousand, five hundred forty-two".