166001432465 has 48 divisors (see below), whose sum is σ = 232852793040. Its totient is φ = 113128857600.

The previous prime is 166001432449. The next prime is 166001432477. The reversal of 166001432465 is 564234100661.

It can be written as a sum of positive squares in 8 ways, for example, as 63903289681 + 102098142784 = 252791^2 + 319528^2 .

It is not a de Polignac number, because 166001432465 - 2⁴ = 166001432449 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2320025 + ... + 2390505.

It is an arithmetic number, because the mean of its divisors is an integer number (4851099855).

Almost surely, 2^166001432465 is an apocalyptic number.

It is an amenable number.

166001432465 is a deficient number, since it is larger than the sum of its proper divisors (66851360575).

166001432465 is a wasteful number, since it uses less digits than its factorization.

166001432465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70754 (or 70743 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 38.

The spelling of 166001432465 in words is "one hundred sixty-six billion, one million, four hundred thirty-two thousand, four hundred sixty-five".