66736707406734 has 64 divisors (see below), whose sum is σ = 140439463971840. Its totient is φ = 21112207079040.

The previous prime is 66736707406723. The next prime is 66736707406739. The reversal of 66736707406734 is 43760470763766.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66736707406739) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 784357 + ... + 11579664.

It is an arithmetic number, because the mean of its divisors is an integer number (2194366624560).

Almost surely, 2^{66736707406734} is an apocalyptic number.

66736707406734 is an abundant number, since it is smaller than the sum of its proper divisors (73702756565106).

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

66736707406734 is a wasteful number, since it uses less digits than its factorization.

66736707406734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12364585.

The product of its (nonzero) digits is 448084224, while the sum is 66.

The spelling of 66736707406734 in words is "sixty-six trillion, seven hundred thirty-six billion, seven hundred seven million, four hundred six thousand, seven hundred thirty-four".