66402285131 has 16 divisors (see below), whose sum is σ = 82067865600. Its totient is φ = 52318230048.

The previous prime is 66402285091. The next prime is 66402285137. The reversal of 66402285131 is 13158220466.

It is not a de Polignac number, because 66402285131 - 2¹⁰ = 66402284107 is a prime.

It is a super-2 number, since 2×66402285131² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66402285137) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1504811 + ... + 1548308.

It is an arithmetic number, because the mean of its divisors is an integer number (5129241600).

Almost surely, 2^66402285131 is an apocalyptic number.

66402285131 is a deficient number, since it is larger than the sum of its proper divisors (15665580469).

66402285131 is a wasteful number, since it uses less digits than its factorization.

66402285131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3053378.

The product of its (nonzero) digits is 69120, while the sum is 38.

The spelling of 66402285131 in words is "sixty-six billion, four hundred two million, two hundred eighty-five thousand, one hundred thirty-one".