7720420899 has 8 divisors (see below), whose sum is σ = 10334907072. Its totient is φ = 5126441000.

The previous prime is 7720420891. The next prime is 7720420927. The reversal of 7720420899 is 9980240277.

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

It is a cyclic number.

It is not a de Polignac number, because 7720420899 - 2³ = 7720420891 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7720420891) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5125689 + ... + 5127194.

It is an arithmetic number, because the mean of its divisors is an integer number (1291863384).

Almost surely, 2^7720420899 is an apocalyptic number.

7720420899 is a deficient number, since it is larger than the sum of its proper divisors (2614486173).

7720420899 is a wasteful number, since it uses less digits than its factorization.

7720420899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10253137.

The product of its (nonzero) digits is 508032, while the sum is 48.

The square root of 7720420899 is about 87865.9256993290. The cubic root of 7720420899 is about 1976.4249417838.

The spelling of 7720420899 in words is "seven billion, seven hundred twenty million, four hundred twenty thousand, eight hundred ninety-nine".