66277342500 has 60 divisors (see below), whose sum is σ = 193247078640. Its totient is φ = 17673956000.

The previous prime is 66277342493. The next prime is 66277342529. The reversal of 66277342500 is 524377266.

It is a tau number, because it is divible by the number of its divisors (60).

It is a super-2 number, since 2×66277342500² (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 19 ways as a sum of consecutive naturals, for example, 4410990 + ... + 4425989.

It is an arithmetic number, because the mean of its divisors is an integer number (3220784644).

Almost surely, 2^66277342500 is an apocalyptic number.

66277342500 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66277342500 is an abundant number, since it is smaller than the sum of its proper divisors (126969736140).

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

66277342500 is a wasteful number, since it uses less digits than its factorization.

66277342500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8837006 (or 8836989 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 42.

The spelling of 66277342500 in words is "sixty-six billion, two hundred seventy-seven million, three hundred forty-two thousand, five hundred".