66622217948 has 48 divisors (see below), whose sum is σ = 137957124480. Its totient is φ = 27752241600.

The previous prime is 66622217941. The next prime is 66622217951. The reversal of 66622217948 is 84971222666.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 66622217948.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66622217941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 339458 + ... + 498473.

It is an arithmetic number, because the mean of its divisors is an integer number (2874106760).

Almost surely, 2^66622217948 is an apocalyptic number.

It is an amenable number.

66622217948 is an abundant number, since it is smaller than the sum of its proper divisors (71334906532).

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

66622217948 is a wasteful number, since it uses less digits than its factorization.

66622217948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 838098 (or 838096 counting only the distinct ones).

The product of its digits is 3483648, while the sum is 53.

The spelling of 66622217948 in words is "sixty-six billion, six hundred twenty-two million, two hundred seventeen thousand, nine hundred forty-eight".