67750385 has 4 divisors (see below), whose sum is σ = 81300468. Its totient is φ = 54200304.

The previous prime is 67750381. The next prime is 67750391. The reversal of 67750385 is 58305776.

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 24137569 + 43612816 = 4913^2 + 6604^2 .

It is a cyclic number.

It is not a de Polignac number, because 67750385 - 2² = 67750381 is a prime.

It is a super-2 number, since 2×67750385² = 9180229335296450, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67750381) 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, 6775034 + ... + 6775043.

It is an arithmetic number, because the mean of its divisors is an integer number (20325117).

Almost surely, 2^67750385 is an apocalyptic number.

It is an amenable number.

67750385 is a deficient number, since it is larger than the sum of its proper divisors (13550083).

67750385 is a wasteful number, since it uses less digits than its factorization.

67750385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13550082.

The product of its (nonzero) digits is 176400, while the sum is 41.

The square root of 67750385 is about 8231.0622036284. The cubic root of 67750385 is about 407.6654653166.

The spelling of 67750385 in words is "sixty-seven million, seven hundred fifty thousand, three hundred eighty-five".