66151823213 has 16 divisors (see below), whose sum is σ = 76354941696. Its totient is φ = 56139644160.

The previous prime is 66151823209. The next prime is 66151823239. The reversal of 66151823213 is 31232815166.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 66151823213 - 2² = 66151823209 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66151823263) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 178520 + ... + 405182.

It is an arithmetic number, because the mean of its divisors is an integer number (4772183856).

Almost surely, 2^66151823213 is an apocalyptic number.

It is an amenable number.

66151823213 is a deficient number, since it is larger than the sum of its proper divisors (10203118483).

66151823213 is a wasteful number, since it uses less digits than its factorization.

66151823213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227084.

The product of its digits is 51840, while the sum is 38.

The spelling of 66151823213 in words is "sixty-six billion, one hundred fifty-one million, eight hundred twenty-three thousand, two hundred thirteen".