425581667 has 4 divisors (see below), whose sum is σ = 486379056. Its totient is φ = 364784280.

The previous prime is 425581657. The next prime is 425581669. The reversal of 425581667 is 766185524.

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

It is not a de Polignac number, because 425581667 - 2¹⁰ = 425580643 is a prime.

It is a super-2 number, since 2×425581667² = 362239510572997778, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (425581669) 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 3 ways as a sum of consecutive naturals, for example, 30398684 + ... + 30398697.

It is an arithmetic number, because the mean of its divisors is an integer number (121594764).

Almost surely, 2^425581667 is an apocalyptic number.

425581667 is a deficient number, since it is larger than the sum of its proper divisors (60797389).

425581667 is an equidigital number, since it uses as much as digits as its factorization.

425581667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60797388.

The product of its digits is 403200, while the sum is 44.

The square root of 425581667 is about 20629.6308013498. The cubic root of 425581667 is about 752.1901415552.

The spelling of 425581667 in words is "four hundred twenty-five million, five hundred eighty-one thousand, six hundred sixty-seven".