74555669 has 2 divisors, whose sum is σ = 74555670. Its totient is φ = 74555668.

The previous prime is 74555641. The next prime is 74555699. The reversal of 74555669 is 96655547.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39212644 + 35343025 = 6262^2 + 5945^2 .

It is a cyclic number.

It is not a de Polignac number, because 74555669 - 2⁸ = 74555413 is a prime.

It is a super-2 number, since 2×74555669² = 11117095560075122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74555699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37277834 + 37277835.

It is an arithmetic number, because the mean of its divisors is an integer number (37277835).

Almost surely, 2^74555669 is an apocalyptic number.

It is an amenable number.

74555669 is a deficient number, since it is larger than the sum of its proper divisors (1).

74555669 is an equidigital number, since it uses as much as digits as its factorization.

74555669 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1134000, while the sum is 47.

The square root of 74555669 is about 8634.5624672012. The cubic root of 74555669 is about 420.8818752968.

The spelling of 74555669 in words is "seventy-four million, five hundred fifty-five thousand, six hundred sixty-nine".