1066421447 has 24 divisors (see below), whose sum is σ = 1348300800. Its totient is φ = 835966656.

The previous prime is 1066421431. The next prime is 1066421467. The reversal of 1066421447 is 7441246601.

It is not a de Polignac number, because 1066421447 - 2⁴ = 1066421431 is a prime.

It is a super-2 number, since 2×1066421447² = 2274509405243147618, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1066421467) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 61754 + ... + 77112.

It is an arithmetic number, because the mean of its divisors is an integer number (56179200).

Almost surely, 2^1066421447 is an apocalyptic number.

1066421447 is a deficient number, since it is larger than the sum of its proper divisors (281879353).

1066421447 is a wasteful number, since it uses less digits than its factorization.

1066421447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15495 (or 15488 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 35.

The square root of 1066421447 is about 32656.1088772070. The cubic root of 1066421447 is about 1021.6676062974.

The spelling of 1066421447 in words is "one billion, sixty-six million, four hundred twenty-one thousand, four hundred forty-seven".