425667657 has 4 divisors (see below), whose sum is σ = 567556880. Its totient is φ = 283778436.

The previous prime is 425667611. The next prime is 425667667. The reversal of 425667657 is 756766524.

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 not a de Polignac number, because 425667657 - 2⁸ = 425667401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (425667667) 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, 70944607 + ... + 70944612.

It is an arithmetic number, because the mean of its divisors is an integer number (141889220).

Almost surely, 2^425667657 is an apocalyptic number.

It is an amenable number.

425667657 is a deficient number, since it is larger than the sum of its proper divisors (141889223).

425667657 is a wasteful number, since it uses less digits than its factorization.

425667657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141889222.

The product of its digits is 2116800, while the sum is 48.

The square root of 425667657 is about 20631.7148342061. The cubic root of 425667657 is about 752.2407988708.

The spelling of 425667657 in words is "four hundred twenty-five million, six hundred sixty-seven thousand, six hundred fifty-seven".