166544340 has 24 divisors (see below), whose sum is σ = 466324320. Its totient is φ = 44411808.

The previous prime is 166544327. The next prime is 166544353. The reversal of 166544340 is 43445661.

It is an interprime number because it is at equal distance from previous prime (166544327) and next prime (166544353).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1387810 + ... + 1387929.

It is an arithmetic number, because the mean of its divisors is an integer number (19430180).

Almost surely, 2^166544340 is an apocalyptic number.

166544340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166544340 is an abundant number, since it is smaller than the sum of its proper divisors (299779980).

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

166544340 is a wasteful number, since it uses less digits than its factorization.

166544340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2775751 (or 2775749 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 33.

The square root of 166544340 is about 12905.2059262919. The cubic root of 166544340 is about 550.1865372781.

The spelling of 166544340 in words is "one hundred sixty-six million, five hundred forty-four thousand, three hundred forty".