1061633666 has 4 divisors (see below), whose sum is σ = 1592450502. Its totient is φ = 530816832.

The previous prime is 1061633659. The next prime is 1061633681. The reversal of 1061633666 is 6663361601.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 604914025 + 456719641 = 24595^2 + 21371^2 .

It is a super-2 number, since 2×1061633666² = 2254132081569199112, which contains 22 as substring.

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 as a sum of consecutive naturals, namely, 265408415 + ... + 265408418.

Almost surely, 2^1061633666 is an apocalyptic number.

1061633666 is a deficient number, since it is larger than the sum of its proper divisors (530816836).

1061633666 is an equidigital number, since it uses as much as digits as its factorization.

1061633666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 530816835.

The product of its (nonzero) digits is 69984, while the sum is 38.

The square root of 1061633666 is about 32582.7203591106. The cubic root of 1061633666 is about 1020.1363607263.

The spelling of 1061633666 in words is "one billion, sixty-one million, six hundred thirty-three thousand, six hundred sixty-six".