61705667 has 2 divisors, whose sum is σ = 61705668. Its totient is φ = 61705666.

The previous prime is 61705639. The next prime is 61705669. The reversal of 61705667 is 76650716.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61705667 - 2⁸ = 61705411 is a prime.

Together with 61705669, 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 61705667.

It is not a weakly prime, because it can be changed into another prime (61705669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30852833 + 30852834.

It is an arithmetic number, because the mean of its divisors is an integer number (30852834).

Almost surely, 2^61705667 is an apocalyptic number.

61705667 is a deficient number, since it is larger than the sum of its proper divisors (1).

61705667 is an equidigital number, since it uses as much as digits as its factorization.

61705667 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 52920, while the sum is 38.

The square root of 61705667 is about 7855.2954750283. The cubic root of 61705667 is about 395.1618564369.

The spelling of 61705667 in words is "sixty-one million, seven hundred five thousand, six hundred sixty-seven".