66550022 has 16 divisors (see below), whose sum is σ = 124457472. Its totient is φ = 25928520.

The previous prime is 66550021. The next prime is 66550037. The reversal of 66550022 is 22005566.

It is a happy number.

It is a zygodrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 66549973 and 66550000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66550021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 215918 + ... + 216225.

It is an arithmetic number, because the mean of its divisors is an integer number (7778592).

Almost surely, 2^66550022 is an apocalyptic number.

66550022 is a deficient number, since it is larger than the sum of its proper divisors (57907450).

66550022 is a wasteful number, since it uses less digits than its factorization.

66550022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432163.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 66550022 is about 8157.8196842048. The cubic root of 66550022 is about 405.2435095054.

Adding to 66550022 its reverse (22005566), we get a palindrome (88555588).

The spelling of 66550022 in words is "sixty-six million, five hundred fifty thousand, twenty-two".