66534413 has 8 divisors (see below), whose sum is σ = 76852800. Its totient is φ = 56927680.

The previous prime is 66534397. The next prime is 66534437. The reversal of 66534413 is 31443566.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66534413 - 2⁴ = 66534397 is a prime.

It is a super-2 number, since 2×66534413² = 8853656226509138, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 66534413.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66534113) 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, 177713 + ... + 178086.

It is an arithmetic number, because the mean of its divisors is an integer number (9606600).

Almost surely, 2^66534413 is an apocalyptic number.

It is an amenable number.

66534413 is a deficient number, since it is larger than the sum of its proper divisors (10318387).

66534413 is a wasteful number, since it uses less digits than its factorization.

66534413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355827.

The product of its digits is 25920, while the sum is 32.

The square root of 66534413 is about 8156.8629386548. The cubic root of 66534413 is about 405.2118243641.

Adding to 66534413 its reverse (31443566), we get a palindrome (97977979).

The spelling of 66534413 in words is "sixty-six million, five hundred thirty-four thousand, four hundred thirteen".