66155016613 has 8 divisors (see below), whose sum is σ = 75612906432. Its totient is φ = 56698920096.

The previous prime is 66155016611. The next prime is 66155016617. The reversal of 66155016613 is 31661055166.

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

It is not a de Polignac number, because 66155016613 - 2¹ = 66155016611 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66155016611) 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, 368320 + ... + 517657.

It is an arithmetic number, because the mean of its divisors is an integer number (9451613304).

Almost surely, 2^66155016613 is an apocalyptic number.

It is an amenable number.

66155016613 is a deficient number, since it is larger than the sum of its proper divisors (9457889819).

66155016613 is a wasteful number, since it uses less digits than its factorization.

66155016613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 896651.

The product of its (nonzero) digits is 97200, while the sum is 40.

The spelling of 66155016613 in words is "sixty-six billion, one hundred fifty-five million, sixteen thousand, six hundred thirteen".