1661024066 has 32 divisors (see below), whose sum is σ = 2846875248. Its totient is φ = 720046080.

The previous prime is 1661024011. The next prime is 1661024087. The reversal of 1661024066 is 6604201661.

It can be written as a sum of positive squares in 8 ways, for example, as 866066041 + 794958025 = 29429^2 + 28195^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 226676 + ... + 233888.

Almost surely, 2^1661024066 is an apocalyptic number.

1661024066 is a deficient number, since it is larger than the sum of its proper divisors (1185851182).

1661024066 is a wasteful number, since it uses less digits than its factorization.

1661024066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7766.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 1661024066 is about 40755.6629930124. The cubic root of 1661024066 is about 1184.2915801119.

The spelling of 1661024066 in words is "one billion, six hundred sixty-one million, twenty-four thousand, sixty-six".