1155901066 has 4 divisors (see below), whose sum is σ = 1733851602. Its totient is φ = 577950532.

The previous prime is 1155901063. The next prime is 1155901067. The reversal of 1155901066 is 6601095511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6601095511 = 373 ⋅17697307.

It can be written as a sum of positive squares in only one way, i.e., 1132659025 + 23242041 = 33655^2 + 4821^2 .

It is a super-2 number, since 2×1155901066² = 2672214548759872712, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1155901063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 288975265 + ... + 288975268.

Almost surely, 2^1155901066 is an apocalyptic number.

1155901066 is a deficient number, since it is larger than the sum of its proper divisors (577950536).

1155901066 is an equidigital number, since it uses as much as digits as its factorization.

1155901066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 577950535.

The product of its (nonzero) digits is 8100, while the sum is 34.

The square root of 1155901066 is about 33998.5450571050. The cubic root of 1155901066 is about 1049.4785214002.

Adding to 1155901066 its reverse (6601095511), we get a palindrome (7756996577).

The spelling of 1155901066 in words is "one billion, one hundred fifty-five million, nine hundred one thousand, sixty-six".