66531102 has 32 divisors (see below), whose sum is σ = 146530944. Its totient is φ = 19970400.

The previous prime is 66531097. The next prime is 66531107. The reversal of 66531102 is 20113566.

It is an interprime number because it is at equal distance from previous prime (66531097) and next prime (66531107).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66531107) 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, 2352 + ... + 11772.

It is an arithmetic number, because the mean of its divisors is an integer number (4579092).

Almost surely, 2^66531102 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66531102, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73265472).

66531102 is an abundant number, since it is smaller than the sum of its proper divisors (79999842).

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

66531102 is a wasteful number, since it uses less digits than its factorization.

66531102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9544.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 66531102 is about 8156.6599782019. The cubic root of 66531102 is about 405.2051026365.

Adding to 66531102 its reverse (20113566), we get a palindrome (86644668).

The spelling of 66531102 in words is "sixty-six million, five hundred thirty-one thousand, one hundred two".