77875725 has 48 divisors (see below), whose sum is σ = 137884032. Its totient is φ = 38645760.

The previous prime is 77875717. The next prime is 77875727. The reversal of 77875725 is 52757877.

It is not a de Polignac number, because 77875725 - 2³ = 77875717 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77875727) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 131029 + ... + 131621.

It is an arithmetic number, because the mean of its divisors is an integer number (2872584).

Almost surely, 2^77875725 is an apocalyptic number.

77875725 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

77875725 is a deficient number, since it is larger than the sum of its proper divisors (60008307).

77875725 is a wasteful number, since it uses less digits than its factorization.

77875725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 726 (or 721 counting only the distinct ones).

The product of its digits is 960400, while the sum is 48.

The square root of 77875725 is about 8824.7223752365. The cubic root of 77875725 is about 427.0388310296.

The spelling of 77875725 in words is "seventy-seven million, eight hundred seventy-five thousand, seven hundred twenty-five".