66051213 has 16 divisors (see below), whose sum is σ = 89724096. Its totient is φ = 43211520.

The previous prime is 66051191. The next prime is 66051217. The reversal of 66051213 is 31215066.

It is not a de Polignac number, because 66051213 - 2¹² = 66047117 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66051217) 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, 74533 + ... + 75413.

It is an arithmetic number, because the mean of its divisors is an integer number (5607756).

Almost surely, 2^66051213 is an apocalyptic number.

It is an amenable number.

66051213 is a deficient number, since it is larger than the sum of its proper divisors (23672883).

66051213 is a wasteful number, since it uses less digits than its factorization.

66051213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1324.

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

The square root of 66051213 is about 8127.1897356959. The cubic root of 66051213 is about 404.2285023232.

Adding to 66051213 its reverse (31215066), we get a palindrome (97266279).

The spelling of 66051213 in words is "sixty-six million, fifty-one thousand, two hundred thirteen".