1666056534 has 32 divisors (see below), whose sum is σ = 3517344000. Its totient is φ = 524644704.

The previous prime is 1666056533. The next prime is 1666056541. The reversal of 1666056534 is 4356506661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1666056533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20572 + ... + 61280.

It is an arithmetic number, because the mean of its divisors is an integer number (109917000).

Almost surely, 2^1666056534 is an apocalyptic number.

1666056534 is an abundant number, since it is smaller than the sum of its proper divisors (1851287466).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1666056534 is a wasteful number, since it uses less digits than its factorization.

1666056534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41092.

The product of its (nonzero) digits is 388800, while the sum is 42.

The square root of 1666056534 is about 40817.3557938287. The cubic root of 1666056534 is about 1185.4864053854.

The spelling of 1666056534 in words is "one billion, six hundred sixty-six million, fifty-six thousand, five hundred thirty-four".