66735623067 has 16 divisors (see below), whose sum is σ = 93148144128. Its totient is φ = 42419199680.

The previous prime is 66735623051. The next prime is 66735623089. The reversal of 66735623067 is 76032653766.

It is a cyclic number.

It is not a de Polignac number, because 66735623067 - 2⁴ = 66735623051 is a prime.

It is a super-2 number, since 2×66735623067² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66735625067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1533498 + ... + 1576415.

It is an arithmetic number, because the mean of its divisors is an integer number (5821759008).

Almost surely, 2^66735623067 is an apocalyptic number.

66735623067 is a deficient number, since it is larger than the sum of its proper divisors (26412521061).

66735623067 is a wasteful number, since it uses less digits than its factorization.

66735623067 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3110250.

The product of its (nonzero) digits is 5715360, while the sum is 51.

The spelling of 66735623067 in words is "sixty-six billion, seven hundred thirty-five million, six hundred twenty-three thousand, sixty-seven".