67991724725 has 12 divisors (see below), whose sum is σ = 84313261344. Its totient is φ = 54391107120.

The previous prime is 67991724649. The next prime is 67991724737. The reversal of 67991724725 is 52742719976.

It is not a de Polignac number, because 67991724725 - 2⁸ = 67991724469 is a prime.

It is a hoax number, since the sum of its digits (59) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 816992 + ... + 896358.

It is an arithmetic number, because the mean of its divisors is an integer number (7026105112).

Almost surely, 2^67991724725 is an apocalyptic number.

It is an amenable number.

67991724725 is a deficient number, since it is larger than the sum of its proper divisors (16321536619).

67991724725 is a wasteful number, since it uses less digits than its factorization.

67991724725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113644 (or 113639 counting only the distinct ones).

The product of its digits is 13335840, while the sum is 59.

The spelling of 67991724725 in words is "sixty-seven billion, nine hundred ninety-one million, seven hundred twenty-four thousand, seven hundred twenty-five".