67749530 has 8 divisors (see below), whose sum is σ = 121949172. Its totient is φ = 27099808.

The previous prime is 67749509. The next prime is 67749551. The reversal of 67749530 is 3594776.

It is an interprime number because it is at equal distance from previous prime (67749509) and next prime (67749551).

It can be written as a sum of positive squares in 2 ways, for example, as 67749361 + 169 = 8231^2 + 13^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3387467 + ... + 3387486.

Almost surely, 2^67749530 is an apocalyptic number.

67749530 is a deficient number, since it is larger than the sum of its proper divisors (54199642).

67749530 is a wasteful number, since it uses less digits than its factorization.

67749530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6774960.

The product of its (nonzero) digits is 158760, while the sum is 41.

The square root of 67749530 is about 8231.0102660609. The cubic root of 67749530 is about 407.6637504164.

The spelling of 67749530 in words is "sixty-seven million, seven hundred forty-nine thousand, five hundred thirty".