7951661597 has 4 divisors (see below), whose sum is σ = 8674539936. Its totient is φ = 7228783260.

The previous prime is 7951661593. The next prime is 7951661611.

7951661597 is nontrivially palindromic in base 10.

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 7951661597 - 2² = 7951661593 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 (7951661593) 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, 361439153 + ... + 361439174.

It is an arithmetic number, because the mean of its divisors is an integer number (2168634984).

Almost surely, 2^7951661597 is an apocalyptic number.

It is an amenable number.

7951661597 is a deficient number, since it is larger than the sum of its proper divisors (722878339).

7951661597 is a wasteful number, since it uses less digits than its factorization.

7951661597 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 722878338.

The product of its digits is 3572100, while the sum is 56.

The square root of 7951661597 is about 89172.0897871077. The cubic root of 7951661597 is about 1995.9636592065.

The spelling of 7951661597 in words is "seven billion, nine hundred fifty-one million, six hundred sixty-one thousand, five hundred ninety-seven".