1948522666 has 16 divisors (see below), whose sum is σ = 2940406920. Its totient is φ = 968396800.

The previous prime is 1948522661. The next prime is 1948522679. The reversal of 1948522666 is 6662258491.

It can be written as a sum of positive squares in 4 ways, for example, as 1425440025 + 523082641 = 37755^2 + 22871^2 .

It is not an unprimeable number, because it can be changed into a prime (1948522661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 629250 + ... + 632338.

Almost surely, 2^1948522666 is an apocalyptic number.

1948522666 is a deficient number, since it is larger than the sum of its proper divisors (991884254).

1948522666 is a wasteful number, since it uses less digits than its factorization.

1948522666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4889.

The product of its digits is 1244160, while the sum is 49.

The square root of 1948522666 is about 44142.0736486178. The cubic root of 1948522666 is about 1249.0173965414.

The spelling of 1948522666 in words is "one billion, nine hundred forty-eight million, five hundred twenty-two thousand, six hundred sixty-six".