77780325 has 24 divisors (see below), whose sum is σ = 146968768. Its totient is φ = 35556480.

The previous prime is 77780317. The next prime is 77780341. The reversal of 77780325 is 52308777.

It is not a de Polignac number, because 77780325 - 2³ = 77780317 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 73552 + ... + 74601.

Almost surely, 2^77780325 is an apocalyptic number.

77780325 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

77780325 is a deficient number, since it is larger than the sum of its proper divisors (69188443).

77780325 is a wasteful number, since it uses less digits than its factorization.

77780325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148173 (or 148168 counting only the distinct ones).

The product of its (nonzero) digits is 82320, while the sum is 39.

The square root of 77780325 is about 8819.3154496253. The cubic root of 77780325 is about 426.8643814969.

The spelling of 77780325 in words is "seventy-seven million, seven hundred eighty thousand, three hundred twenty-five".