1664651226 has 48 divisors (see below), whose sum is σ = 3876211584. Its totient is φ = 475203456.

The previous prime is 1664651213. The next prime is 1664651249. The reversal of 1664651226 is 6221564661.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 549151 + ... + 552173.

It is an arithmetic number, because the mean of its divisors is an integer number (80754408).

Almost surely, 2^1664651226 is an apocalyptic number.

1664651226 is an abundant number, since it is smaller than the sum of its proper divisors (2211560358).

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

1664651226 is a wasteful number, since it uses less digits than its factorization.

1664651226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4915 (or 4908 counting only the distinct ones).

The product of its digits is 103680, while the sum is 39.

The square root of 1664651226 is about 40800.1375732975. The cubic root of 1664651226 is about 1185.1529948982.

The spelling of 1664651226 in words is "one billion, six hundred sixty-four million, six hundred fifty-one thousand, two hundred twenty-six".