67551616 has 32 divisors (see below), whose sum is σ = 146812680. Its totient is φ = 30704640.

The previous prime is 67551587. The next prime is 67551619. The reversal of 67551616 is 61615576.

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×67551616² = 9126441648422912, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67551619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22581 + ... + 25396.

Almost surely, 2^67551616 is an apocalyptic number.

It is an amenable number.

67551616 is an abundant number, since it is smaller than the sum of its proper divisors (79261064).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

67551616 is a wasteful number, since it uses less digits than its factorization.

67551616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48002 (or 47990 counting only the distinct ones).

The product of its digits is 37800, while the sum is 37.

The square root of 67551616 is about 8218.9790120185. The cubic root of 67551616 is about 407.2663992910.

The spelling of 67551616 in words is "sixty-seven million, five hundred fifty-one thousand, six hundred sixteen".