166369456 has 40 divisors (see below), whose sum is σ = 353240784. Its totient is φ = 75279360.

The previous prime is 166369447. The next prime is 166369459. The reversal of 166369456 is 654963661.

It is not an unprimeable number, because it can be changed into a prime (166369459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38980 + ... + 43036.

Almost surely, 2^166369456 is an apocalyptic number.

166369456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

166369456 is the 6895-th centered heptagonal number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 166369456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (176620392).

166369456 is an abundant number, since it is smaller than the sum of its proper divisors (186871328).

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

166369456 is a wasteful number, since it uses less digits than its factorization.

166369456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4309 (or 4303 counting only the distinct ones).

The product of its digits is 699840, while the sum is 46.

The square root of 166369456 is about 12898.4284314020. The cubic root of 166369456 is about 549.9938908412.

The spelling of 166369456 in words is "one hundred sixty-six million, three hundred sixty-nine thousand, four hundred fifty-six".