1061666357 has 2 divisors, whose sum is σ = 1061666358. Its totient is φ = 1061666356.

The previous prime is 1061666351. The next prime is 1061666369. The reversal of 1061666357 is 7536661601.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 824321521 + 237344836 = 28711^2 + 15406^2 .

It is a cyclic number.

It is not a de Polignac number, because 1061666357 - 2⁸ = 1061666101 is a prime.

It is a super-2 number, since 2×1061666357² = 2254270907171302898, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1061666351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 530833178 + 530833179.

It is an arithmetic number, because the mean of its divisors is an integer number (530833179).

Almost surely, 2^1061666357 is an apocalyptic number.

It is an amenable number.

1061666357 is a deficient number, since it is larger than the sum of its proper divisors (1).

1061666357 is an equidigital number, since it uses as much as digits as its factorization.

1061666357 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 136080, while the sum is 41.

The square root of 1061666357 is about 32583.2220168601. Note that the first 3 decimals coincide. The cubic root of 1061666357 is about 1020.1468316752.

The spelling of 1061666357 in words is "one billion, sixty-one million, six hundred sixty-six thousand, three hundred fifty-seven".