66477669 has 8 divisors (see below), whose sum is σ = 89851392. Its totient is φ = 43711200.

The previous prime is 66477661. The next prime is 66477673. The reversal of 66477669 is 96677466.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 66477669 - 2³ = 66477661 is a prime.

It is a super-2 number, since 2×66477669² = 8838560951347122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66477661) 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 in 7 ways as a sum of consecutive naturals, for example, 151557 + ... + 151994.

It is an arithmetic number, because the mean of its divisors is an integer number (11231424).

Almost surely, 2^66477669 is an apocalyptic number.

It is an amenable number.

66477669 is a deficient number, since it is larger than the sum of its proper divisors (23373723).

66477669 is a wasteful number, since it uses less digits than its factorization.

66477669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303627.

The product of its digits is 2286144, while the sum is 51.

The square root of 66477669 is about 8153.3838987257. The cubic root of 66477669 is about 405.0965963768.

The spelling of 66477669 in words is "sixty-six million, four hundred seventy-seven thousand, six hundred sixty-nine".