1066719998 has 32 divisors (see below), whose sum is σ = 1651584000. Its totient is φ = 516551904.

The previous prime is 1066719991. The next prime is 1066720007. The reversal of 1066719998 is 8999176601.

It is a super-2 number, since 2×1066719998² = 2275783108266240008, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1066719991) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2906411 + ... + 2906777.

It is an arithmetic number, because the mean of its divisors is an integer number (51612000).

Almost surely, 2^1066719998 is an apocalyptic number.

1066719998 is a deficient number, since it is larger than the sum of its proper divisors (584864002).

1066719998 is a wasteful number, since it uses less digits than its factorization.

1066719998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 744.

The product of its (nonzero) digits is 1469664, while the sum is 56.

The square root of 1066719998 is about 32660.6796928662. The cubic root of 1066719998 is about 1021.7629380342.

The spelling of 1066719998 in words is "one billion, sixty-six million, seven hundred nineteen thousand, nine hundred ninety-eight".