66506022 has 40 divisors (see below), whose sum is σ = 162574632. Its totient is φ = 20152800.

The previous prime is 66506021. The next prime is 66506029. The reversal of 66506022 is 22060566.

66506022 is a `hidden beast` number, since 6 + 6 + 50 + 602 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66506021) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 16879 + ... + 20442.

Almost surely, 2^66506022 is an apocalyptic number.

66506022 is an abundant number, since it is smaller than the sum of its proper divisors (96068610).

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

66506022 is a wasteful number, since it uses less digits than its factorization.

66506022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37346 (or 37337 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 66506022 is about 8155.1224393016. The cubic root of 66506022 is about 405.1541799807.

Adding to 66506022 its reverse (22060566), we get a palindrome (88566588).

The spelling of 66506022 in words is "sixty-six million, five hundred six thousand, twenty-two".