66512103 has 32 divisors (see below), whose sum is σ = 107942400. Its totient is φ = 35582976.

The previous prime is 66512101. The next prime is 66512107. The reversal of 66512103 is 30121566.

It is not a de Polignac number, because 66512103 - 2¹ = 66512101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66512101) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34575 + ... + 36447.

It is an arithmetic number, because the mean of its divisors is an integer number (3373200).

Almost surely, 2^66512103 is an apocalyptic number.

66512103 is a deficient number, since it is larger than the sum of its proper divisors (41430297).

66512103 is a wasteful number, since it uses less digits than its factorization.

66512103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1991.

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

The square root of 66512103 is about 8155.4952639309. The cubic root of 66512103 is about 405.1665280729.

Adding to 66512103 its reverse (30121566), we get a palindrome (96633669).

The spelling of 66512103 in words is "sixty-six million, five hundred twelve thousand, one hundred three".