7772821066 has 8 divisors (see below), whose sum is σ = 12166154784. Its totient is φ = 3717436140.

The previous prime is 7772821061. The next prime is 7772821079. The reversal of 7772821066 is 6601282777.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (46), and also a Moran number because the ratio is a prime number: 168974371 = 7772821066 / (7 + 7 + 7 + 2 + 8 + 2 + 1 + 0 + 6 + 6).

It is not an unprimeable number, because it can be changed into a prime (7772821061) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 84487140 + ... + 84487231.

It is an arithmetic number, because the mean of its divisors is an integer number (1520769348).

Almost surely, 2^7772821066 is an apocalyptic number.

7772821066 is a deficient number, since it is larger than the sum of its proper divisors (4393333718).

7772821066 is a wasteful number, since it uses less digits than its factorization.

7772821066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168974396.

The product of its (nonzero) digits is 395136, while the sum is 46.

The square root of 7772821066 is about 88163.6039757904. The cubic root of 7772821066 is about 1980.8863380326.

The spelling of 7772821066 in words is "seven billion, seven hundred seventy-two million, eight hundred twenty-one thousand, sixty-six".