7620798366721 has 4 divisors (see below), whose sum is σ = 7624456937392. Its totient is φ = 7617139796052.

The previous prime is 7620798366707. The next prime is 7620798366761. The reversal of 7620798366721 is 1276638970267.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 7620798366721 - 2²⁵ = 7620764812289 is a prime.

It is a super-2 number, since 2×7620798366721² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7620798366761) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1829282211 + ... + 1829286376.

It is an arithmetic number, because the mean of its divisors is an integer number (1906114234348).

Almost surely, 2^{7620798366721} is an apocalyptic number.

It is an amenable number.

7620798366721 is a deficient number, since it is larger than the sum of its proper divisors (3658570671).

7620798366721 is a wasteful number, since it uses less digits than its factorization.

7620798366721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3658570670.

The product of its (nonzero) digits is 64012032, while the sum is 64.

The spelling of 7620798366721 in words is "seven trillion, six hundred twenty billion, seven hundred ninety-eight million, three hundred sixty-six thousand, seven hundred twenty-one".