61516667 has 2 divisors, whose sum is σ = 61516668. Its totient is φ = 61516666.

The previous prime is 61516649. The next prime is 61516669. The reversal of 61516667 is 76661516.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61516667 - 2⁶ = 61516603 is a prime.

Together with 61516669, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61516667.

It is not a weakly prime, because it can be changed into another prime (61516669) 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, 30758333 + 30758334.

It is an arithmetic number, because the mean of its divisors is an integer number (30758334).

Almost surely, 2^61516667 is an apocalyptic number.

61516667 is a deficient number, since it is larger than the sum of its proper divisors (1).

61516667 is an equidigital number, since it uses as much as digits as its factorization.

61516667 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 45360, while the sum is 38.

The square root of 61516667 is about 7843.2561477998. The cubic root of 61516667 is about 394.7579930820.

The spelling of 61516667 in words is "sixty-one million, five hundred sixteen thousand, six hundred sixty-seven".