66736707366736 has 40 divisors (see below), whose sum is σ = 141266726279424. Its totient is φ = 30289792834560.

The previous prime is 66736707366661. The next prime is 66736707366751. The reversal of 66736707366736 is 63766370763766.

It is a super-2 number, since 2×66736707366736² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 281594656 + ... + 281831551.

Almost surely, 2^{66736707366736} is an apocalyptic number.

It is an amenable number.

66736707366736 is an abundant number, since it is smaller than the sum of its proper divisors (74530018912688).

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

66736707366736 is a wasteful number, since it uses less digits than its factorization.

66736707366736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 563426899 (or 563426893 counting only the distinct ones).

The product of its (nonzero) digits is 3024568512, while the sum is 73.

The spelling of 66736707366736 in words is "sixty-six trillion, seven hundred thirty-six billion, seven hundred seven million, three hundred sixty-six thousand, seven hundred thirty-six".