66144485321476 has 27 divisors (see below), whose sum is σ = 116827676265909. Its totient is φ = 32767949234448.

The previous prime is 66144485321471. The next prime is 66144485321491. The reversal of 66144485321476 is 67412358444166.

The square root of 66144485321476 is 8132926.

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

It can be written as a sum of positive squares in only one way, i.e., 46102388935876 + 20042096385600 = 6789874^2 + 4476840^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66144485321471) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1772959215 + ... + 1772996521.

Almost surely, 2^{66144485321476} is an apocalyptic number.

66144485321476 is the 8132926-th square number.

It is an amenable number.

66144485321476 is a deficient number, since it is larger than the sum of its proper divisors (50683190944433).

66144485321476 is an frugal number, since it uses more digits than its factorization.

66144485321476 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74836 (or 37418 counting only the distinct ones).

The product of its digits is 92897280, while the sum is 61.

The spelling of 66144485321476 in words is "sixty-six trillion, one hundred forty-four billion, four hundred eighty-five million, three hundred twenty-one thousand, four hundred seventy-six".