66736707073994 has 16 divisors (see below), whose sum is σ = 100170465280200. Its totient is φ = 33346556269824.

The previous prime is 66736707073963. The next prime is 66736707074047. The reversal of 66736707073994 is 49937070763766.

It can be written as a sum of positive squares in 4 ways, for example, as 64450148767225 + 2286558306769 = 8028085^2 + 1512137^2 .

It is a super-2 number, since 2×66736707073994² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30199862 + ... + 32334270.

Almost surely, 2^{66736707073994} is an apocalyptic number.

66736707073994 is a deficient number, since it is larger than the sum of its proper divisors (33433758206206).

66736707073994 is a wasteful number, since it uses less digits than its factorization.

66736707073994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2144617.

The product of its (nonzero) digits is 1512284256, while the sum is 74.

The spelling of 66736707073994 in words is "sixty-six trillion, seven hundred thirty-six billion, seven hundred seven million, seventy-three thousand, nine hundred ninety-four".