66007036053981 has 48 divisors (see below), whose sum is σ = 105951825802368. Its totient is φ = 39591848482560.

The previous prime is 66007036053967. The next prime is 66007036054013. The reversal of 66007036053981 is 18935063070066.

66007036053981 is a `hidden beast` number, since 6 + 6 + 0 + 0 + 70 + 36 + 0 + 539 + 8 + 1 = 666.

It is not a de Polignac number, because 66007036053981 - 2¹⁹ = 66007035529693 is a prime.

It is a super-2 number, since 2×66007036053981² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66007036051981) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 27241281 + ... + 29565206.

It is an arithmetic number, because the mean of its divisors is an integer number (2207329704216).

Almost surely, 2^{66007036053981} is an apocalyptic number.

It is an amenable number.

66007036053981 is a deficient number, since it is larger than the sum of its proper divisors (39944789748387).

66007036053981 is a wasteful number, since it uses less digits than its factorization.

66007036053981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56806623 (or 56806598 counting only the distinct ones).

The product of its (nonzero) digits is 4898880, while the sum is 54.

The spelling of 66007036053981 in words is "sixty-six trillion, seven billion, thirty-six million, fifty-three thousand, nine hundred eighty-one".