67781725 has 24 divisors (see below), whose sum is σ = 92619072. Its totient is φ = 48796800.

The previous prime is 67781723. The next prime is 67781731. The reversal of 67781725 is 52718776.

It is not a de Polignac number, because 67781725 - 2¹ = 67781723 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67781723) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27129 + ... + 29521.

It is an arithmetic number, because the mean of its divisors is an integer number (3859128).

Almost surely, 2^67781725 is an apocalyptic number.

It is an amenable number.

67781725 is a deficient number, since it is larger than the sum of its proper divisors (24837347).

67781725 is a wasteful number, since it uses less digits than its factorization.

67781725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2517 (or 2512 counting only the distinct ones).

The product of its digits is 164640, while the sum is 43.

The square root of 67781725 is about 8232.9657475299. The cubic root of 67781725 is about 407.7283149775.

The spelling of 67781725 in words is "sixty-seven million, seven hundred eighty-one thousand, seven hundred twenty-five".