1066889901 has 32 divisors (see below), whose sum is σ = 1782890496. Its totient is φ = 551304000.

The previous prime is 1066889897. The next prime is 1066889921. The reversal of 1066889901 is 1099886601.

It is not a de Polignac number, because 1066889901 - 2² = 1066889897 is a prime.

It is a super-2 number, since 2×1066889901² = 2276508121711579602, which contains 22 as substring.

1066889901 is a strobogrammatic number because it is the same when read upside-down.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1066889921) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 32031 + ... + 56211.

It is an arithmetic number, because the mean of its divisors is an integer number (55715328).

Almost surely, 2^1066889901 is an apocalyptic number.

1066889901 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1066889901 is a deficient number, since it is larger than the sum of its proper divisors (716000595).

1066889901 is a wasteful number, since it uses less digits than its factorization.

1066889901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24393.

The product of its (nonzero) digits is 186624, while the sum is 48.

The square root of 1066889901 is about 32663.2806221298. The cubic root of 1066889901 is about 1021.8171826260.

The spelling of 1066889901 in words is "one billion, sixty-six million, eight hundred eighty-nine thousand, nine hundred one".