66004631265531 has 32 divisors (see below), whose sum is σ = 102083640524800. Its totient is φ = 37154674196640.

The previous prime is 66004631265527. The next prime is 66004631265563. The reversal of 66004631265531 is 13556213640066.

It is not a de Polignac number, because 66004631265531 - 2² = 66004631265527 is a prime.

It is a super-2 number, since 2×66004631265531² (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 (66004631265431) 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, 44585815 + ... + 46042416.

It is an arithmetic number, because the mean of its divisors is an integer number (3190113766400).

Almost surely, 2^{66004631265531} is an apocalyptic number.

66004631265531 is a deficient number, since it is larger than the sum of its proper divisors (36079009259269).

66004631265531 is a wasteful number, since it uses less digits than its factorization.

66004631265531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90628759.

The product of its (nonzero) digits is 2332800, while the sum is 48.

The spelling of 66004631265531 in words is "sixty-six trillion, four billion, six hundred thirty-one million, two hundred sixty-five thousand, five hundred thirty-one".