66163722 has 16 divisors (see below), whose sum is σ = 133281120. Its totient is φ = 21895632.

The previous prime is 66163697. The next prime is 66163729. The reversal of 66163722 is 22736166.

It is not an unprimeable number, because it can be changed into a prime (66163729) 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, 38833 + ... + 40500.

It is an arithmetic number, because the mean of its divisors is an integer number (8330070).

Almost surely, 2^66163722 is an apocalyptic number.

66163722 is an abundant number, since it is smaller than the sum of its proper divisors (67117398).

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

66163722 is a wasteful number, since it uses less digits than its factorization.

66163722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79477.

The product of its digits is 18144, while the sum is 33.

The square root of 66163722 is about 8134.1085559513. The cubic root of 66163722 is about 404.4578876963.

Adding to 66163722 its reverse (22736166), we get a palindrome (88899888).

The spelling of 66163722 in words is "sixty-six million, one hundred sixty-three thousand, seven hundred twenty-two".