1648511066 has 4 divisors (see below), whose sum is σ = 2472766602. Its totient is φ = 824255532.

The previous prime is 1648511047. The next prime is 1648511069. The reversal of 1648511066 is 6601158461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6601158461 = 3559 ⋅1854779.

It can be written as a sum of positive squares in only one way, i.e., 1024960225 + 623550841 = 32015^2 + 24971^2 .

It is not an unprimeable number, because it can be changed into a prime (1648511069) 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 as a sum of consecutive naturals, namely, 412127765 + ... + 412127768.

Almost surely, 2^1648511066 is an apocalyptic number.

1648511066 is a deficient number, since it is larger than the sum of its proper divisors (824255536).

1648511066 is an equidigital number, since it uses as much as digits as its factorization.

1648511066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 824255535.

The product of its (nonzero) digits is 34560, while the sum is 38.

The square root of 1648511066 is about 40601.8603760961. The cubic root of 1648511066 is about 1181.3102046487.

The spelling of 1648511066 in words is "one billion, six hundred forty-eight million, five hundred eleven thousand, sixty-six".