1157660566 has 8 divisors (see below), whose sum is σ = 1748145600. Its totient is φ = 574945368.

The previous prime is 1157660563. The next prime is 1157660579. The reversal of 1157660566 is 6650667511.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1157660561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1942086 + ... + 1942681.

It is an arithmetic number, because the mean of its divisors is an integer number (218518200).

Almost surely, 2^1157660566 is an apocalyptic number.

1157660566 is a deficient number, since it is larger than the sum of its proper divisors (590485034).

1157660566 is a wasteful number, since it uses less digits than its factorization.

1157660566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3884918.

The product of its (nonzero) digits is 226800, while the sum is 43.

The square root of 1157660566 is about 34024.4113248121. The cubic root of 1157660566 is about 1050.0107530267.

The spelling of 1157660566 in words is "one billion, one hundred fifty-seven million, six hundred sixty thousand, five hundred sixty-six".