166465642634 has 8 divisors (see below), whose sum is σ = 249722660100. Its totient is φ = 83224755936.

The previous prime is 166465642613. The next prime is 166465642639. The reversal of 166465642634 is 436246564661.

It can be written as a sum of positive squares in 2 ways, for example, as 156303994609 + 10161648025 = 395353^2 + 100805^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (166465642639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4006859 + ... + 4048190.

Almost surely, 2^166465642634 is an apocalyptic number.

166465642634 is a deficient number, since it is larger than the sum of its proper divisors (83257017466).

166465642634 is a wasteful number, since it uses less digits than its factorization.

166465642634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8065384.

The product of its digits is 14929920, while the sum is 53.

The spelling of 166465642634 in words is "one hundred sixty-six billion, four hundred sixty-five million, six hundred forty-two thousand, six hundred thirty-four".