427621663 has 8 divisors (see below), whose sum is σ = 495405728. Its totient is φ = 361511424.

The previous prime is 427621661. The next prime is 427621693. The reversal of 427621663 is 366126724.

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

It is a cyclic number.

It is not a de Polignac number, because 427621663 - 2¹ = 427621661 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 (427621661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 417906 + ... + 418927.

It is an arithmetic number, because the mean of its divisors is an integer number (61925716).

Almost surely, 2^427621663 is an apocalyptic number.

427621663 is a deficient number, since it is larger than the sum of its proper divisors (67784065).

427621663 is an equidigital number, since it uses as much as digits as its factorization.

427621663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 836913.

The product of its digits is 72576, while the sum is 37.

The square root of 427621663 is about 20679.0150394065. The cubic root of 427621663 is about 753.3900832850.

The spelling of 427621663 in words is "four hundred twenty-seven million, six hundred twenty-one thousand, six hundred sixty-three".