66150011 has 4 divisors (see below), whose sum is σ = 66363024. Its totient is φ = 65937000.

The previous prime is 66149983. The next prime is 66150017. The reversal of 66150011 is 11005166.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11005166 = 2 ⋅5502583.

It is a cyclic number.

It is not a de Polignac number, because 66150011 - 2⁶ = 66149947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66150017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106040 + ... + 106661.

It is an arithmetic number, because the mean of its divisors is an integer number (16590756).

Almost surely, 2^66150011 is an apocalyptic number.

66150011 is a deficient number, since it is larger than the sum of its proper divisors (213013).

66150011 is a wasteful number, since it uses less digits than its factorization.

66150011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213012.

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 66150011 is about 8133.2657032707. The cubic root of 66150011 is about 404.4299473838.

Adding to 66150011 its reverse (11005166), we get a palindrome (77155177).

The spelling of 66150011 in words is "sixty-six million, one hundred fifty thousand, eleven".