65966474442 has 32 divisors (see below), whose sum is σ = 146366300160. Its totient is φ = 19651028720.

The previous prime is 65966474429. The next prime is 65966474479. The reversal of 65966474442 is 24447466956.

It is a happy number.

It is a super-2 number, since 2×65966474442² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8466378 + ... + 8474165.

It is an arithmetic number, because the mean of its divisors is an integer number (4573946880).

Almost surely, 2^65966474442 is an apocalyptic number.

65966474442 is an abundant number, since it is smaller than the sum of its proper divisors (80399825718).

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

65966474442 is a wasteful number, since it uses less digits than its factorization.

65966474442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16940618.

The product of its digits is 34836480, while the sum is 57.

The spelling of 65966474442 in words is "sixty-five billion, nine hundred sixty-six million, four hundred seventy-four thousand, four hundred forty-two".