7099920561 has 4 divisors (see below), whose sum is σ = 9466560752. Its totient is φ = 4733280372.

The previous prime is 7099920557. The next prime is 7099920587. The reversal of 7099920561 is 1650299907.

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 not a de Polignac number, because 7099920561 - 2² = 7099920557 is a prime.

It is a super-3 number, since 3×7099920561³ (a number of 31 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7099920561.

It is not an unprimeable number, because it can be changed into a prime (7099920461) 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, 1183320091 + ... + 1183320096.

It is an arithmetic number, because the mean of its divisors is an integer number (2366640188).

Almost surely, 2^7099920561 is an apocalyptic number.

It is an amenable number.

7099920561 is a deficient number, since it is larger than the sum of its proper divisors (2366640191).

7099920561 is a wasteful number, since it uses less digits than its factorization.

7099920561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2366640190.

The product of its (nonzero) digits is 306180, while the sum is 48.

The square root of 7099920561 is about 84261.0263467043. The cubic root of 7099920561 is about 1921.9901746002.

The spelling of 7099920561 in words is "seven billion, ninety-nine million, nine hundred twenty thousand, five hundred sixty-one".