825664677 has 4 divisors (see below), whose sum is σ = 1100886240. Its totient is φ = 550443116.

The previous prime is 825664673. The next prime is 825664691. The reversal of 825664677 is 776466528.

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 825664677 - 2² = 825664673 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (825664673) 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, 137610777 + ... + 137610782.

It is an arithmetic number, because the mean of its divisors is an integer number (275221560).

Almost surely, 2^825664677 is an apocalyptic number.

It is an amenable number.

825664677 is a deficient number, since it is larger than the sum of its proper divisors (275221563).

825664677 is a wasteful number, since it uses less digits than its factorization.

825664677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275221562.

The product of its digits is 3386880, while the sum is 51.

The square root of 825664677 is about 28734.3814445344. The cubic root of 825664677 is about 938.1405360570.

The spelling of 825664677 in words is "eight hundred twenty-five million, six hundred sixty-four thousand, six hundred seventy-seven".