696777641 has 4 divisors (see below), whose sum is σ = 796317312. Its totient is φ = 597237972.

The previous prime is 696777619. The next prime is 696777643. The reversal of 696777641 is 146777696.

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 696777641 - 2¹⁸ = 696515497 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (696777643) 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, 49769825 + ... + 49769838.

It is an arithmetic number, because the mean of its divisors is an integer number (199079328).

Almost surely, 2^696777641 is an apocalyptic number.

It is an amenable number.

696777641 is a deficient number, since it is larger than the sum of its proper divisors (99539671).

696777641 is an equidigital number, since it uses as much as digits as its factorization.

696777641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99539670.

The product of its digits is 2667168, while the sum is 53.

The square root of 696777641 is about 26396.5460051121. The cubic root of 696777641 is about 886.5394555439.

Subtracting from 696777641 its reverse (146777696), we obtain a palindrome (549999945).

The spelling of 696777641 in words is "six hundred ninety-six million, seven hundred seventy-seven thousand, six hundred forty-one".