1666666327530 has 64 divisors (see below), whose sum is σ = 4033941834240. Its totient is φ = 440687267904.

The previous prime is 1666666327483. The next prime is 1666666327537. The reversal of 1666666327530 is 357236666661.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1666666327537) 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, 1416177 + ... + 2310603.

It is an arithmetic number, because the mean of its divisors is an integer number (63030341160).

Almost surely, 2^{1666666327530} is an apocalyptic number.

1666666327530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1666666327530 is an abundant number, since it is smaller than the sum of its proper divisors (2367275506710).

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

1666666327530 is a wasteful number, since it uses less digits than its factorization.

1666666327530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 894963.

The product of its (nonzero) digits is 29393280, while the sum is 57.

The spelling of 1666666327530 in words is "one trillion, six hundred sixty-six billion, six hundred sixty-six million, three hundred twenty-seven thousand, five hundred thirty".