7120661616 has 160 divisors (see below), whose sum is σ = 22780684800. Its totient is φ = 2116316160.

The previous prime is 7120661533. The next prime is 7120661623. The reversal of 7120661616 is 6161660217.

7120661616 is a `hidden beast` number, since 7 + 1 + 20 + 6 + 616 + 16 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 114021 + ... + 165051.

It is an arithmetic number, because the mean of its divisors is an integer number (142379280).

Almost surely, 2^7120661616 is an apocalyptic number.

7120661616 is a gapful number since it is divisible by the number (76) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7120661616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11390342400).

7120661616 is an abundant number, since it is smaller than the sum of its proper divisors (15660023184).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7120661616 is a wasteful number, since it uses less digits than its factorization.

7120661616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51084 (or 51072 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 7120661616 is about 84384.0127986338. The cubic root of 7120661616 is about 1923.8599301847.

The spelling of 7120661616 in words is "seven billion, one hundred twenty million, six hundred sixty-one thousand, six hundred sixteen".