663476477 has 4 divisors (see below), whose sum is σ = 684878976. Its totient is φ = 642073980.

The previous prime is 663476467. The next prime is 663476479. The reversal of 663476477 is 774674366.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 663476477 - 2¹⁸ = 663214333 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663476479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10701203 + ... + 10701264.

It is an arithmetic number, because the mean of its divisors is an integer number (171219744).

Almost surely, 2^663476477 is an apocalyptic number.

It is an amenable number.

663476477 is a deficient number, since it is larger than the sum of its proper divisors (21402499).

663476477 is a wasteful number, since it uses less digits than its factorization.

663476477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21402498.

The product of its digits is 3556224, while the sum is 50.

The square root of 663476477 is about 25758.0371340675. The cubic root of 663476477 is about 872.1847924478.

The spelling of 663476477 in words is "six hundred sixty-three million, four hundred seventy-six thousand, four hundred seventy-seven".