166245696440 has 16 divisors (see below), whose sum is σ = 374052817080. Its totient is φ = 66498278560.

The previous prime is 166245696439. The next prime is 166245696497. The reversal of 166245696440 is 44696542661.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2078071166 + ... + 2078071245.

Almost surely, 2^166245696440 is an apocalyptic number.

166245696440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166245696440 is an abundant number, since it is smaller than the sum of its proper divisors (207807120640).

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

166245696440 is a wasteful number, since it uses less digits than its factorization.

166245696440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4156142422 (or 4156142418 counting only the distinct ones).

The product of its (nonzero) digits is 7464960, while the sum is 53.

The spelling of 166245696440 in words is "one hundred sixty-six billion, two hundred forty-five million, six hundred ninety-six thousand, four hundred forty".