66040328404531 has 8 divisors (see below), whose sum is σ = 73042525387664. Its totient is φ = 59312727381600.

The previous prime is 66040328404507. The next prime is 66040328404541. The reversal of 66040328404531 is 13540482304066.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66040328404531 - 2⁵ = 66040328404499 is a prime.

It is a super-2 number, since 2×66040328404531² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66040328404541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68648989545 + ... + 68648990506.

It is an arithmetic number, because the mean of its divisors is an integer number (9130315673458).

Almost surely, 2^{66040328404531} is an apocalyptic number.

66040328404531 is a deficient number, since it is larger than the sum of its proper divisors (7002196983133).

66040328404531 is a wasteful number, since it uses less digits than its factorization.

66040328404531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137297980101.

The product of its (nonzero) digits is 1658880, while the sum is 46.

The spelling of 66040328404531 in words is "sixty-six trillion, forty billion, three hundred twenty-eight million, four hundred four thousand, five hundred thirty-one".