67401577345 has 4 divisors (see below), whose sum is σ = 80881892820. Its totient is φ = 53921261872.

The previous prime is 67401577301. The next prime is 67401577363. The reversal of 67401577345 is 54377510476.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 45951924496 + 21449652849 = 214364^2 + 146457^2 .

It is a cyclic number.

It is not a de Polignac number, because 67401577345 - 2¹⁵ = 67401544577 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6740157730 + ... + 6740157739.

It is an arithmetic number, because the mean of its divisors is an integer number (20220473205).

Almost surely, 2^67401577345 is an apocalyptic number.

It is an amenable number.

67401577345 is a deficient number, since it is larger than the sum of its proper divisors (13480315475).

67401577345 is a wasteful number, since it uses less digits than its factorization.

67401577345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13480315474.

The product of its (nonzero) digits is 2469600, while the sum is 49.

The spelling of 67401577345 in words is "sixty-seven billion, four hundred one million, five hundred seventy-seven thousand, three hundred forty-five".