61669567 has 2 divisors, whose sum is σ = 61669568. Its totient is φ = 61669566.

The previous prime is 61669561. The next prime is 61669589. The reversal of 61669567 is 76596616.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61669567 - 2¹¹ = 61667519 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61669561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30834783 + 30834784.

It is an arithmetic number, because the mean of its divisors is an integer number (30834784).

Almost surely, 2^61669567 is an apocalyptic number.

61669567 is a deficient number, since it is larger than the sum of its proper divisors (1).

61669567 is an equidigital number, since it uses as much as digits as its factorization.

61669567 is an evil number, because the sum of its binary digits is even.

The product of its digits is 408240, while the sum is 46.

The square root of 61669567 is about 7852.9973258623. The cubic root of 61669567 is about 395.0847801784.

The spelling of 61669567 in words is "sixty-one million, six hundred sixty-nine thousand, five hundred sixty-seven".