77777325 has 36 divisors (see below), whose sum is σ = 142565280. Its totient is φ = 40511520.

The previous prime is 77777321. The next prime is 77777327. The reversal of 77777325 is 52377777.

It is not a de Polignac number, because 77777325 - 2² = 77777321 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77777321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 5656 + ... + 13694.

Almost surely, 2^77777325 is an apocalyptic number.

77777325 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

77777325 is a deficient number, since it is larger than the sum of its proper divisors (64787955).

77777325 is a wasteful number, since it uses less digits than its factorization.

77777325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8098 (or 8090 counting only the distinct ones).

The product of its digits is 504210, while the sum is 45.

The square root of 77777325 is about 8819.1453667575. The cubic root of 77777325 is about 426.8588933498.

The spelling of 77777325 in words is "seventy-seven million, seven hundred seventy-seven thousand, three hundred twenty-five".