66598060356 has 135 divisors (see below), whose sum is σ = 177833166511. Its totient is φ = 21823093224.

The previous prime is 66598060283. The next prime is 66598060369. The reversal of 66598060356 is 65306089566.

The square root of 66598060356 is 258066.

It is a perfect power (a square), and thus also a powerful number.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 1128780655 + ... + 1128780713.

Almost surely, 2^66598060356 is an apocalyptic number.

66598060356 is the 258066-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66598060356

66598060356 is an abundant number, since it is smaller than the sum of its proper divisors (111235106155).

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

66598060356 is an frugal number, since it uses more digits than its factorization.

66598060356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164 (or 64 counting only the distinct ones).

The product of its (nonzero) digits is 6998400, while the sum is 54.

The spelling of 66598060356 in words is "sixty-six billion, five hundred ninety-eight million, sixty thousand, three hundred fifty-six".