61667503 has 2 divisors, whose sum is σ = 61667504. Its totient is φ = 61667502.

The previous prime is 61667471. The next prime is 61667519. The reversal of 61667503 is 30576616.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61667503 - 2⁵ = 61667471 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61667303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30833751 + 30833752.

It is an arithmetic number, because the mean of its divisors is an integer number (30833752).

Almost surely, 2^61667503 is an apocalyptic number.

61667503 is a deficient number, since it is larger than the sum of its proper divisors (1).

61667503 is an equidigital number, since it uses as much as digits as its factorization.

61667503 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22680, while the sum is 34.

The square root of 61667503 is about 7852.8659099720. The cubic root of 61667503 is about 395.0803724717.

The spelling of 61667503 in words is "sixty-one million, six hundred sixty-seven thousand, five hundred three".