663477667 has 4 divisors (see below), whose sum is σ = 664083576. Its totient is φ = 662871760.

The previous prime is 663477613. The next prime is 663477671. The reversal of 663477667 is 766774366.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 663477667 - 2¹¹ = 663475619 is a prime.

It is a super-2 number, since 2×663477667² = 880405229215525778, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (663477677) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 301309 + ... + 303502.

It is an arithmetic number, because the mean of its divisors is an integer number (166020894).

Almost surely, 2^663477667 is an apocalyptic number.

663477667 is a deficient number, since it is larger than the sum of its proper divisors (605909).

663477667 is a wasteful number, since it uses less digits than its factorization.

663477667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 605908.

The product of its digits is 5334336, while the sum is 52.

The square root of 663477667 is about 25758.0602336434. The cubic root of 663477667 is about 872.1853138927.

The spelling of 663477667 in words is "six hundred sixty-three million, four hundred seventy-seven thousand, six hundred sixty-seven".