7721008084 has 6 divisors (see below), whose sum is σ = 13511764154. Its totient is φ = 3860504040.

The previous prime is 7721008079. The next prime is 7721008123. The reversal of 7721008084 is 4808001277.

It can be written as a sum of positive squares in only one way, i.e., 3947608900 + 3773399184 = 62830^2 + 61428^2 .

It is a super-2 number, since 2×7721008084² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 965126007 + ... + 965126014.

Almost surely, 2^7721008084 is an apocalyptic number.

It is an amenable number.

7721008084 is a deficient number, since it is larger than the sum of its proper divisors (5790756070).

7721008084 is a wasteful number, since it uses less digits than its factorization.

7721008084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1930252025 (or 1930252023 counting only the distinct ones).

The product of its (nonzero) digits is 25088, while the sum is 37.

The square root of 7721008084 is about 87869.2670050229. The cubic root of 7721008084 is about 1976.4750468957.

The spelling of 7721008084 in words is "seven billion, seven hundred twenty-one million, eight thousand, eighty-four".