66645805461011 has 8 divisors (see below), whose sum is σ = 76167044423520. Its totient is φ = 57124668901248.

The previous prime is 66645805461007. The next prime is 66645805461049. The reversal of 66645805461011 is 11016450854666.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 66645805461011 - 2² = 66645805461007 is a prime.

It is a super-2 number, since 2×66645805461011² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66645895461011) 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, 24200966 + ... + 26813771.

It is an arithmetic number, because the mean of its divisors is an integer number (9520880552940).

Almost surely, 2^{66645805461011} is an apocalyptic number.

66645805461011 is a deficient number, since it is larger than the sum of its proper divisors (9521238962509).

66645805461011 is a wasteful number, since it uses less digits than its factorization.

66645805461011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51201373.

The product of its (nonzero) digits is 4147200, while the sum is 53.

The spelling of 66645805461011 in words is "sixty-six trillion, six hundred forty-five billion, eight hundred five million, four hundred sixty-one thousand, eleven".