67540551 has 16 divisors (see below), whose sum is σ = 99047424. Its totient is φ = 40677984.

The previous prime is 67540531. The next prime is 67540553. The reversal of 67540551 is 15504576.

It is not a de Polignac number, because 67540551 - 2⁵ = 67540519 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67540553) 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, 16591 + ... + 20256.

It is an arithmetic number, because the mean of its divisors is an integer number (6190464).

Almost surely, 2^67540551 is an apocalyptic number.

67540551 is a deficient number, since it is larger than the sum of its proper divisors (31506873).

67540551 is a wasteful number, since it uses less digits than its factorization.

67540551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36910.

The product of its (nonzero) digits is 21000, while the sum is 33.

The square root of 67540551 is about 8218.3058473143. The cubic root of 67540551 is about 407.2441612403.

The spelling of 67540551 in words is "sixty-seven million, five hundred forty thousand, five hundred fifty-one".