1066645427 has 32 divisors (see below), whose sum is σ = 1190707200. Its totient is φ = 951588000.

The previous prime is 1066645423. The next prime is 1066645429. The reversal of 1066645427 is 7245466601.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1066645427 - 2² = 1066645423 is a prime.

It is a super-2 number, since 2×1066645427² = 2275464933880024658, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1066645423) 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, 5958824 + ... + 5959002.

It is an arithmetic number, because the mean of its divisors is an integer number (37209600).

Almost surely, 2^1066645427 is an apocalyptic number.

1066645427 is a deficient number, since it is larger than the sum of its proper divisors (124061773).

1066645427 is a wasteful number, since it uses less digits than its factorization.

1066645427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 447.

The product of its (nonzero) digits is 241920, while the sum is 41.

The square root of 1066645427 is about 32659.5380708301. The cubic root of 1066645427 is about 1021.7391280810.

The spelling of 1066645427 in words is "one billion, sixty-six million, six hundred forty-five thousand, four hundred twenty-seven".