67615481 has 2 divisors, whose sum is σ = 67615482. Its totient is φ = 67615480.

The previous prime is 67615453. The next prime is 67615487. The reversal of 67615481 is 18451676.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46308025 + 21307456 = 6805^2 + 4616^2 .

It is a cyclic number.

It is not a de Polignac number, because 67615481 - 2¹⁴ = 67599097 is a prime.

It is a super-2 number, since 2×67615481² = 9143706541722722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (67615487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33807740 + 33807741.

It is an arithmetic number, because the mean of its divisors is an integer number (33807741).

Almost surely, 2^67615481 is an apocalyptic number.

It is an amenable number.

67615481 is a deficient number, since it is larger than the sum of its proper divisors (1).

67615481 is an equidigital number, since it uses as much as digits as its factorization.

67615481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40320, while the sum is 38.

The square root of 67615481 is about 8222.8633090913. The cubic root of 67615481 is about 407.3947055037.

The spelling of 67615481 in words is "sixty-seven million, six hundred fifteen thousand, four hundred eighty-one".