166774945699 has 12 divisors (see below), whose sum is σ = 176074577320. Its totient is φ = 157965275340.

The previous prime is 166774945651. The next prime is 166774945709. The reversal of 166774945699 is 996549477661.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It is not a de Polignac number, because 166774945699 - 2¹³ = 166774937507 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166774945609) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33819264 + ... + 33824194.

Almost surely, 2^166774945699 is an apocalyptic number.

166774945699 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

166774945699 is a deficient number, since it is larger than the sum of its proper divisors (9299631621).

166774945699 is an frugal number, since it uses more digits than its factorization.

166774945699 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9919 (or 4950 counting only the distinct ones).

The product of its digits is 617258880, while the sum is 73.

The spelling of 166774945699 in words is "one hundred sixty-six billion, seven hundred seventy-four million, nine hundred forty-five thousand, six hundred ninety-nine".