67264865749 has 4 divisors (see below), whose sum is σ = 69434700160. Its totient is φ = 65095031340.

The previous prime is 67264865711. The next prime is 67264865761. The reversal of 67264865749 is 94756846276.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 67264865749 - 2⁷ = 67264865621 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 (67264866749) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1084917159 + ... + 1084917220.

It is an arithmetic number, because the mean of its divisors is an integer number (17358675040).

Almost surely, 2^67264865749 is an apocalyptic number.

It is an amenable number.

67264865749 is a deficient number, since it is larger than the sum of its proper divisors (2169834411).

67264865749 is a wasteful number, since it uses less digits than its factorization.

67264865749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2169834410.

The product of its digits is 121927680, while the sum is 64.

The spelling of 67264865749 in words is "sixty-seven billion, two hundred sixty-four million, eight hundred sixty-five thousand, seven hundred forty-nine".