67664949 has 16 divisors (see below), whose sum is σ = 98757120. Its totient is φ = 40869360.

The previous prime is 67664939. The next prime is 67664951. The reversal of 67664949 is 94946676.

It is not a de Polignac number, because 67664949 - 2¹¹ = 67662901 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67664939) 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 15 ways as a sum of consecutive naturals, for example, 6792 + ... + 13470.

It is an arithmetic number, because the mean of its divisors is an integer number (6172320).

Almost surely, 2^67664949 is an apocalyptic number.

It is an amenable number.

67664949 is a deficient number, since it is larger than the sum of its proper divisors (31092171).

67664949 is a wasteful number, since it uses less digits than its factorization.

67664949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7000.

The product of its digits is 1959552, while the sum is 51.

The square root of 67664949 is about 8225.8707137907. The cubic root of 67664949 is about 407.4940323062.

The spelling of 67664949 in words is "sixty-seven million, six hundred sixty-four thousand, nine hundred forty-nine".