66912238276 has 27 divisors (see below), whose sum is σ = 126809457831. Its totient is φ = 30879467424.

The previous prime is 66912238259. The next prime is 66912238313. The reversal of 66912238276 is 67283221966.

The square root of 66912238276 is 258674.

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

It can be written as a sum of positive squares in 4 ways, for example, as 15190562500 + 51721675776 = 123250^2 + 227424^2 .

It is a super-2 number, since 2×66912238276² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (52).

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 6720550 + ... + 6730498.

Almost surely, 2^66912238276 is an apocalyptic number.

66912238276 is the 258674-th square number.

It is an amenable number.

66912238276 is a deficient number, since it is larger than the sum of its proper divisors (59897219555).

66912238276 is an frugal number, since it uses more digits than its factorization.

66912238276 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19928 (or 9964 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 52.

The spelling of 66912238276 in words is "sixty-six billion, nine hundred twelve million, two hundred thirty-eight thousand, two hundred seventy-six".