66722278332 has 48 divisors (see below), whose sum is σ = 156956147712. Its totient is φ = 22059858240.

The previous prime is 66722278331. The next prime is 66722278373. The reversal of 66722278332 is 23387222766.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66722278331) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 791773 + ... + 871979.

It is an arithmetic number, because the mean of its divisors is an integer number (3269919744).

Almost surely, 2^66722278332 is an apocalyptic number.

It is an amenable number.

66722278332 is an abundant number, since it is smaller than the sum of its proper divisors (90233869380).

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

66722278332 is a wasteful number, since it uses less digits than its factorization.

66722278332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80778 (or 80776 counting only the distinct ones).

The product of its digits is 2032128, while the sum is 48.

The spelling of 66722278332 in words is "sixty-six billion, seven hundred twenty-two million, two hundred seventy-eight thousand, three hundred thirty-two".