67520351 has 4 divisors (see below), whose sum is σ = 68627304. Its totient is φ = 66413400.

The previous prime is 67520347. The next prime is 67520353. The reversal of 67520351 is 15302576.

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

It is a cyclic number.

It is not a de Polignac number, because 67520351 - 2² = 67520347 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 (67520353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 553385 + ... + 553506.

It is an arithmetic number, because the mean of its divisors is an integer number (17156826).

Almost surely, 2^67520351 is an apocalyptic number.

67520351 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

67520351 is a deficient number, since it is larger than the sum of its proper divisors (1106953).

67520351 is a wasteful number, since it uses less digits than its factorization.

67520351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1106952.

The product of its (nonzero) digits is 6300, while the sum is 29.

The square root of 67520351 is about 8217.0767916577. The cubic root of 67520351 is about 407.2035577205.

The spelling of 67520351 in words is "sixty-seven million, five hundred twenty thousand, three hundred fifty-one".