166743744001 has 4 divisors (see below), whose sum is σ = 166873709232. Its totient is φ = 166613778772.

The previous prime is 166743743987. The next prime is 166743744007. The reversal of 166743744001 is 100447347661.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 100447347661 = 63073 ⋅1592557.

It is a cyclic number.

It is not a de Polignac number, because 166743744001 - 2²³ = 166735355393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166743744007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64980691 + ... + 64983256.

It is an arithmetic number, because the mean of its divisors is an integer number (41718427308).

Almost surely, 2^166743744001 is an apocalyptic number.

It is an amenable number.

166743744001 is a deficient number, since it is larger than the sum of its proper divisors (129965231).

166743744001 is a wasteful number, since it uses less digits than its factorization.

166743744001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129965230.

The product of its (nonzero) digits is 338688, while the sum is 43.

The spelling of 166743744001 in words is "one hundred sixty-six billion, seven hundred forty-three million, seven hundred forty-four thousand, one".