7720140867601 has 4 divisors (see below), whose sum is σ = 7720210800100. Its totient is φ = 7720070935104.

The previous prime is 7720140867589. The next prime is 7720140867641. The reversal of 7720140867601 is 1067680410277.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1935225983376 + 5784914884225 = 1391124^2 + 2405185^2 .

It is a cyclic number.

It is not a de Polignac number, because 7720140867601 - 2¹⁹ = 7720140343313 is a prime.

It is a super-2 number, since 2×7720140867601² (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 (7720140867641) 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, 34800396 + ... + 35021533.

It is an arithmetic number, because the mean of its divisors is an integer number (1930052700025).

Almost surely, 2^{7720140867601} is an apocalyptic number.

It is an amenable number.

7720140867601 is a deficient number, since it is larger than the sum of its proper divisors (69932499).

7720140867601 is a wasteful number, since it uses less digits than its factorization.

7720140867601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69932498.

The product of its (nonzero) digits is 790272, while the sum is 49.

The spelling of 7720140867601 in words is "seven trillion, seven hundred twenty billion, one hundred forty million, eight hundred sixty-seven thousand, six hundred one".