6617220772 has 6 divisors (see below), whose sum is σ = 11580136358. Its totient is φ = 3308610384.

The previous prime is 6617220751. The next prime is 6617220781. The reversal of 6617220772 is 2770227166.

It can be written as a sum of positive squares in only one way, i.e., 4830806016 + 1786414756 = 69504^2 + 42266^2 .

It is a super-2 number, since 2×6617220772² = 87575221490776551968, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 827152593 + ... + 827152600.

Almost surely, 2^6617220772 is an apocalyptic number.

It is an amenable number.

6617220772 is a deficient number, since it is larger than the sum of its proper divisors (4962915586).

6617220772 is a wasteful number, since it uses less digits than its factorization.

6617220772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1654305197 (or 1654305195 counting only the distinct ones).

The product of its (nonzero) digits is 98784, while the sum is 40.

The square root of 6617220772 is about 81346.3015262526. The cubic root of 6617220772 is about 1877.4074696110.

The spelling of 6617220772 in words is "six billion, six hundred seventeen million, two hundred twenty thousand, seven hundred seventy-two".