1052021666 has 8 divisors (see below), whose sum is σ = 1620682140. Its totient is φ = 511794288.

The previous prime is 1052021657. The next prime is 1052021671. The reversal of 1052021666 is 6661202501.

It can be written as a sum of positive squares in 2 ways, for example, as 1025344441 + 26677225 = 32021^2 + 5165^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×1052021666² = 2213499171466831112, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7108181 + ... + 7108328.

Almost surely, 2^1052021666 is an apocalyptic number.

1052021666 is a deficient number, since it is larger than the sum of its proper divisors (568660474).

1052021666 is a wasteful number, since it uses less digits than its factorization.

1052021666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14216548.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 1052021666 is about 32434.8834744323. The cubic root of 1052021666 is about 1017.0482604939.

The spelling of 1052021666 in words is "one billion, fifty-two million, twenty-one thousand, six hundred sixty-six".