66145624112011 has 16 divisors (see below), whose sum is σ = 67909520585088. Its totient is φ = 64388947291200.

The previous prime is 66145624111999. The next prime is 66145624112027. The reversal of 66145624112011 is 11021142654166.

It is a cyclic number.

It is not a de Polignac number, because 66145624112011 - 2¹⁷ = 66145623980939 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66145694112011) 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, 109271200 + ... + 109874866.

It is an arithmetic number, because the mean of its divisors is an integer number (4244345036568).

Almost surely, 2^{66145624112011} is an apocalyptic number.

66145624112011 is a deficient number, since it is larger than the sum of its proper divisors (1763896473077).

66145624112011 is a wasteful number, since it uses less digits than its factorization.

66145624112011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 609642.

The product of its (nonzero) digits is 69120, while the sum is 40.

Adding to 66145624112011 its reverse (11021142654166), we get a palindrome (77166766766177).

The spelling of 66145624112011 in words is "sixty-six trillion, one hundred forty-five billion, six hundred twenty-four million, one hundred twelve thousand, eleven".