66641658514 has 8 divisors (see below), whose sum is σ = 100410750720. Its totient is φ = 33171408276.

The previous prime is 66641658493. The next prime is 66641658521. The reversal of 66641658514 is 41585614666.

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

It is a super-2 number, since 2×66641658514² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74709934 + ... + 74710825.

It is an arithmetic number, because the mean of its divisors is an integer number (12551343840).

Almost surely, 2^66641658514 is an apocalyptic number.

66641658514 is a deficient number, since it is larger than the sum of its proper divisors (33769092206).

66641658514 is a wasteful number, since it uses less digits than its factorization.

66641658514 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149420984.

The product of its digits is 4147200, while the sum is 52.

The spelling of 66641658514 in words is "sixty-six billion, six hundred forty-one million, six hundred fifty-eight thousand, five hundred fourteen".