1066637648 has 30 divisors (see below), whose sum is σ = 2092025514. Its totient is φ = 526838848.

The previous prime is 1066637629. The next prime is 1066637651. The reversal of 1066637648 is 8467366601.

It can be written as a sum of positive squares in only one way, i.e., 973939264 + 92698384 = 31208^2 + 9628^2 .

It is a super-2 number, since 2×1066637648² = 2275431744261943808, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 105386 + ... + 115062.

Almost surely, 2^1066637648 is an apocalyptic number.

It is an amenable number.

1066637648 is a deficient number, since it is larger than the sum of its proper divisors (1025387866).

1066637648 is an frugal number, since it uses more digits than its factorization.

1066637648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9851 (or 9762 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 47.

The square root of 1066637648 is about 32659.4189782978. The cubic root of 1066637648 is about 1021.7366442416.

The spelling of 1066637648 in words is "one billion, sixty-six million, six hundred thirty-seven thousand, six hundred forty-eight".