659951622 has 96 divisors (see below), whose sum is σ = 1631784960. Its totient is φ = 190944000.

The previous prime is 659951597. The next prime is 659951623. The reversal of 659951622 is 226159956.

It is a happy number.

659951622 is a `hidden beast` number, since 6 + 599 + 51 + 6 + 2 + 2 = 666.

It is a super-2 number, since 2×659951622² = 871072286760861768, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (659951623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 484222 + ... + 485582.

It is an arithmetic number, because the mean of its divisors is an integer number (16997760).

Almost surely, 2^659951622 is an apocalyptic number.

659951622 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 659951622, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (815892480).

659951622 is an abundant number, since it is smaller than the sum of its proper divisors (971833338).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

659951622 is a wasteful number, since it uses less digits than its factorization.

659951622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1490 (or 1487 counting only the distinct ones).

The product of its digits is 291600, while the sum is 45.

The square root of 659951622 is about 25689.5235845276. The cubic root of 659951622 is about 870.6374955016.

The spelling of 659951622 in words is "six hundred fifty-nine million, nine hundred fifty-one thousand, six hundred twenty-two".