66736736734068 has 72 divisors (see below), whose sum is σ = 172377526216896. Its totient is φ = 21764838950400.

The previous prime is 66736736734067. The next prime is 66736736734081. The reversal of 66736736734068 is 86043763763766.

66736736734068 is a `hidden beast` number, since 6 + 67 + 3 + 67 + 36 + 73 + 406 + 8 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 66736736733987 and 66736736734005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66736736734067) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 99321021 + ... + 99990692.

It is an arithmetic number, because the mean of its divisors is an integer number (2394132308568).

Almost surely, 2^{66736736734068} is an apocalyptic number.

It is an amenable number.

66736736734068 is an abundant number, since it is smaller than the sum of its proper divisors (105640789482828).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66736736734068 is a wasteful number, since it uses less digits than its factorization.

66736736734068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199311925 (or 199311920 counting only the distinct ones).

The product of its (nonzero) digits is 2304433152, while the sum is 72.

The spelling of 66736736734068 in words is "sixty-six trillion, seven hundred thirty-six billion, seven hundred thirty-six million, seven hundred thirty-four thousand, sixty-eight".