67755649 has 12 divisors (see below), whose sum is σ = 73601136. Its totient is φ = 62345712.

The previous prime is 67755637. The next prime is 67755671. The reversal of 67755649 is 94655776.

It is not a de Polignac number, because 67755649 - 2¹⁵ = 67722881 is a prime.

It is a super-2 number, since 2×67755649² = 9181655942822402, which contains 22 as substring.

It is a Duffinian number.

Its product of digits (1587600) is a multiple of the sum of its prime factors (1296).

It is not an unprimeable number, because it can be changed into a prime (67755619) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 98862 + ... + 99544.

It is an arithmetic number, because the mean of its divisors is an integer number (6133428).

Almost surely, 2^67755649 is an apocalyptic number.

It is an amenable number.

67755649 is a deficient number, since it is larger than the sum of its proper divisors (5845487).

67755649 is a wasteful number, since it uses less digits than its factorization.

67755649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1296 (or 1283 counting only the distinct ones).

The product of its digits is 1587600, while the sum is 49.

The square root of 67755649 is about 8231.3819617364. The cubic root of 67755649 is about 407.6760231677.

The spelling of 67755649 in words is "sixty-seven million, seven hundred fifty-five thousand, six hundred forty-nine".