66088583929 has 3 divisors (see below), whose sum is σ = 66088841007. Its totient is φ = 66088326852.

The previous prime is 66088583927. The next prime is 66088583933. The reversal of 66088583929 is 92938588066.

It is a happy number.

The square root of 66088583929 is 257077.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 48913957225 + 17174626704 = 221165^2 + 131052^2 .

It is not a de Polignac number, because 66088583929 - 2¹ = 66088583927 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66088583927) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 128539 + ... + 385615.

It is an arithmetic number, because the mean of its divisors is an integer number (22029613669).

Almost surely, 2^66088583929 is an apocalyptic number.

66088583929 is the 257077-th square number.

66088583929 is the 128539-th centered octagonal number.

It is an amenable number.

66088583929 is a deficient number, since it is larger than the sum of its proper divisors (257078).

66088583929 is an frugal number, since it uses more digits than its factorization.

66088583929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 514154 (or 257077 counting only the distinct ones).

The product of its (nonzero) digits is 44789760, while the sum is 64.

Multiplying 66088583929 by its sum of digits (64), we get a square (4229669371456 = 2056616²).

The spelling of 66088583929 in words is "sixty-six billion, eighty-eight million, five hundred eighty-three thousand, nine hundred twenty-nine".