7266861517 has 4 divisors (see below), whose sum is σ = 7331170140. Its totient is φ = 7202552896.

The previous prime is 7266861397. The next prime is 7266861521. The reversal of 7266861517 is 7151686627.

It is a happy number.

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 3683761636 + 3583099881 = 60694^2 + 59859^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7266861517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7266861527) 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, 32154142 + ... + 32154367.

It is an arithmetic number, because the mean of its divisors is an integer number (1832792535).

Almost surely, 2^7266861517 is an apocalyptic number.

It is an amenable number.

7266861517 is a deficient number, since it is larger than the sum of its proper divisors (64308623).

7266861517 is a wasteful number, since it uses less digits than its factorization.

7266861517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64308622.

The product of its digits is 846720, while the sum is 49.

The square root of 7266861517 is about 85245.8885636134. Note that the first 3 decimals coincide. The cubic root of 7266861517 is about 1936.9375920011.

The spelling of 7266861517 in words is "seven billion, two hundred sixty-six million, eight hundred sixty-one thousand, five hundred seventeen".