660226457 has 6 divisors (see below), whose sum is σ = 725703594. Its totient is φ = 600205760.

The previous prime is 660226439. The next prime is 660226471. The reversal of 660226457 is 754622066.

It can be written as a sum of positive squares in only one way, i.e., 341103961 + 319122496 = 18469^2 + 17864^2 .

It is not a de Polignac number, because 660226457 - 2⁶ = 660226393 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 660226457.

It is not an unprimeable number, because it can be changed into a prime (660226757) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2728088 + ... + 2728329.

It is an arithmetic number, because the mean of its divisors is an integer number (120950599).

Almost surely, 2^660226457 is an apocalyptic number.

It is an amenable number.

660226457 is a deficient number, since it is larger than the sum of its proper divisors (65477137).

660226457 is a wasteful number, since it uses less digits than its factorization.

660226457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5456439 (or 5456428 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 38.

The square root of 660226457 is about 25694.8721927158. The cubic root of 660226457 is about 870.7583369087.

The spelling of 660226457 in words is "six hundred sixty million, two hundred twenty-six thousand, four hundred fifty-seven".