66906011 has 16 divisors (see below), whose sum is σ = 73885440. Its totient is φ = 60302880.

The previous prime is 66906001. The next prime is 66906031. The reversal of 66906011 is 11060966.

It is a cyclic number.

It is not a de Polignac number, because 66906011 - 2⁶ = 66905947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66906001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 123401 + ... + 123941.

It is an arithmetic number, because the mean of its divisors is an integer number (4617840).

Almost surely, 2^66906011 is an apocalyptic number.

66906011 is a deficient number, since it is larger than the sum of its proper divisors (6979429).

66906011 is a wasteful number, since it uses less digits than its factorization.

66906011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 866.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 66906011 is about 8179.6094650050. The cubic root of 66906011 is about 405.9648003489.

Adding to 66906011 its reverse (11060966), we get a palindrome (77966977).

The spelling of 66906011 in words is "sixty-six million, nine hundred six thousand, eleven".