66297628518 has 32 divisors (see below), whose sum is σ = 149315484672. Its totient is φ = 19442119200.

The previous prime is 66297628499. The next prime is 66297628543. The reversal of 66297628518 is 81582679266.

It is a super-2 number, since 2×66297628518² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16199721 + ... + 16203812.

It is an arithmetic number, because the mean of its divisors is an integer number (4666108896).

Almost surely, 2^66297628518 is an apocalyptic number.

66297628518 is an abundant number, since it is smaller than the sum of its proper divisors (83017856154).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66297628518 is a wasteful number, since it uses less digits than its factorization.

66297628518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32403580.

The product of its digits is 17418240, while the sum is 60.

The spelling of 66297628518 in words is "sixty-six billion, two hundred ninety-seven million, six hundred twenty-eight thousand, five hundred eighteen".