66531873502 has 8 divisors (see below), whose sum is σ = 102231903312. Its totient is φ = 32454572400.

The previous prime is 66531873487. The next prime is 66531873503. The reversal of 66531873502 is 20537813566.

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

It is a super-2 number, since 2×66531873502² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66531873503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 405682074 + ... + 405682237.

It is an arithmetic number, because the mean of its divisors is an integer number (12778987914).

Almost surely, 2^66531873502 is an apocalyptic number.

66531873502 is a deficient number, since it is larger than the sum of its proper divisors (35700029810).

66531873502 is a wasteful number, since it uses less digits than its factorization.

66531873502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 811364354.

The product of its (nonzero) digits is 907200, while the sum is 46.

The spelling of 66531873502 in words is "sixty-six billion, five hundred thirty-one million, eight hundred seventy-three thousand, five hundred two".