66712011 has 8 divisors (see below), whose sum is σ = 89349120. Its totient is φ = 44274792.

The previous prime is 66712007. The next prime is 66712027. The reversal of 66712011 is 11021766.

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

It is not a de Polignac number, because 66712011 - 2² = 66712007 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66712091) 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, 49191 + ... + 50528.

It is an arithmetic number, because the mean of its divisors is an integer number (11168640).

Almost surely, 2^66712011 is an apocalyptic number.

66712011 is a deficient number, since it is larger than the sum of its proper divisors (22637109).

66712011 is a wasteful number, since it uses less digits than its factorization.

66712011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99945.

The product of its (nonzero) digits is 504, while the sum is 24.

The square root of 66712011 is about 8167.7420992585. The cubic root of 66712011 is about 405.5720433349.

Adding to 66712011 its reverse (11021766), we get a palindrome (77733777).

The spelling of 66712011 in words is "sixty-six million, seven hundred twelve thousand, eleven".