65066605542 has 24 divisors (see below), whose sum is σ = 141349632840. Its totient is φ = 21631639680.

The previous prime is 65066605507. The next prime is 65066605543. The reversal of 65066605542 is 24550666056.

It is a happy number.

It is a super-2 number, since 2×65066605542² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65066605543) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4762059 + ... + 4775702.

It is an arithmetic number, because the mean of its divisors is an integer number (5889568035).

Almost surely, 2^65066605542 is an apocalyptic number.

65066605542 is an abundant number, since it is smaller than the sum of its proper divisors (76283027298).

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

65066605542 is a wasteful number, since it uses less digits than its factorization.

65066605542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9538148 (or 9538145 counting only the distinct ones).

The product of its (nonzero) digits is 1296000, while the sum is 45.

The spelling of 65066605542 in words is "sixty-five billion, sixty-six million, six hundred five thousand, five hundred forty-two".