66742911 has 24 divisors (see below), whose sum is σ = 98560800. Its totient is φ = 43512000.

The previous prime is 66742889. The next prime is 66742927. The reversal of 66742911 is 11924766.

It is not a de Polignac number, because 66742911 - 2¹³ = 66734719 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66742981) 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 23 ways as a sum of consecutive naturals, for example, 94861 + ... + 95561.

It is an arithmetic number, because the mean of its divisors is an integer number (4106700).

Almost surely, 2^66742911 is an apocalyptic number.

66742911 is a deficient number, since it is larger than the sum of its proper divisors (31817889).

66742911 is a wasteful number, since it uses less digits than its factorization.

66742911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 927 (or 924 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 66742911 is about 8169.6334679103. The cubic root of 66742911 is about 405.6346519593.

The spelling of 66742911 in words is "sixty-six million, seven hundred forty-two thousand, nine hundred eleven".