166405065435 has 48 divisors (see below), whose sum is σ = 343972721664. Its totient is φ = 72763454016.

The previous prime is 166405065401. The next prime is 166405065457. The reversal of 166405065435 is 534560504661.

166405065435 is a `hidden beast` number, since 1 + 6 + 64 + 0 + 506 + 54 + 35 = 666.

It is not a de Polignac number, because 166405065435 - 2¹¹ = 166405063387 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

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, 11476887 + ... + 11491376.

It is an arithmetic number, because the mean of its divisors is an integer number (7166098368).

Almost surely, 2^166405065435 is an apocalyptic number.

166405065435 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

166405065435 is an abundant number, since it is smaller than the sum of its proper divisors (177567656229).

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

166405065435 is a wasteful number, since it uses less digits than its factorization.

166405065435 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22968304 (or 22968301 counting only the distinct ones).

The product of its (nonzero) digits is 1296000, while the sum is 45.

The spelling of 166405065435 in words is "one hundred sixty-six billion, four hundred five million, sixty-five thousand, four hundred thirty-five".