1066421534 has 4 divisors (see below), whose sum is σ = 1599632304. Its totient is φ = 533210766.

The previous prime is 1066421527. The next prime is 1066421539. The reversal of 1066421534 is 4351246601.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×1066421534² = 2274509776357826312, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1066421534.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1066421539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 266605382 + ... + 266605385.

It is an arithmetic number, because the mean of its divisors is an integer number (399908076).

Almost surely, 2^1066421534 is an apocalyptic number.

1066421534 is a deficient number, since it is larger than the sum of its proper divisors (533210770).

1066421534 is an equidigital number, since it uses as much as digits as its factorization.

1066421534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 533210769.

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 1066421534 is about 32656.1102092702. The cubic root of 1066421534 is about 1021.6676340804.

The spelling of 1066421534 in words is "one billion, sixty-six million, four hundred twenty-one thousand, five hundred thirty-four".