66243565151 has 16 divisors (see below), whose sum is σ = 75632628960. Its totient is φ = 57624837120.

The previous prime is 66243565121. The next prime is 66243565153. The reversal of 66243565151 is 15156534266.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66243565151 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 (66243565153) 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, 2487836 + ... + 2514321.

It is an arithmetic number, because the mean of its divisors is an integer number (4727039310).

Almost surely, 2^66243565151 is an apocalyptic number.

66243565151 is a deficient number, since it is larger than the sum of its proper divisors (9389063809).

66243565151 is a wasteful number, since it uses less digits than its factorization.

66243565151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5002234.

The product of its digits is 648000, while the sum is 44.

The spelling of 66243565151 in words is "sixty-six billion, two hundred forty-three million, five hundred sixty-five thousand, one hundred fifty-one".