425435566 has 4 divisors (see below), whose sum is σ = 638153352. Its totient is φ = 212717782.

The previous prime is 425435561. The next prime is 425435567. The reversal of 425435566 is 665534524.

It is a happy number.

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

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (425435561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106358890 + ... + 106358893.

It is an arithmetic number, because the mean of its divisors is an integer number (159538338).

Almost surely, 2^425435566 is an apocalyptic number.

425435566 is a deficient number, since it is larger than the sum of its proper divisors (212717786).

425435566 is a wasteful number, since it uses less digits than its factorization.

425435566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212717785.

The product of its digits is 432000, while the sum is 40.

The square root of 425435566 is about 20626.0894500145. The cubic root of 425435566 is about 752.1040567773.

The spelling of 425435566 in words is "four hundred twenty-five million, four hundred thirty-five thousand, five hundred sixty-six".