66026612520 has 96 divisors (see below), whose sum is σ = 234094367520. Its totient is φ = 16006450560.

The previous prime is 66026612513. The next prime is 66026612557. The reversal of 66026612520 is 2521662066.

66026612520 is a `hidden beast` number, since 6 + 60 + 2 + 66 + 12 + 520 = 666.

It is a super-3 number, since 3×66026612520³ (a number of 33 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8332734 + ... + 8340653.

It is an arithmetic number, because the mean of its divisors is an integer number (2438482995).

Almost surely, 2^66026612520 is an apocalyptic number.

66026612520 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66026612520 is an abundant number, since it is smaller than the sum of its proper divisors (168067755000).

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

66026612520 is a wasteful number, since it uses less digits than its factorization.

66026612520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16673415 (or 16673408 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The spelling of 66026612520 in words is "sixty-six billion, twenty-six million, six hundred twelve thousand, five hundred twenty".