166240540 has 24 divisors (see below), whose sum is σ = 352708272. Its totient is φ = 65809920.

The previous prime is 166240517. The next prime is 166240541. The reversal of 166240540 is 45042661.

It is a junction number, because it is equal to n+sod(n) for n = 166240499 and 166240508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166240541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40906 + ... + 44785.

It is an arithmetic number, because the mean of its divisors is an integer number (14696178).

Almost surely, 2^166240540 is an apocalyptic number.

166240540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166240540 is an abundant number, since it is smaller than the sum of its proper divisors (186467732).

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

166240540 is a wasteful number, since it uses less digits than its factorization.

166240540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85797 (or 85795 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 166240540 is about 12893.4301099436. The cubic root of 166240540 is about 549.8517947784.

The spelling of 166240540 in words is "one hundred sixty-six million, two hundred forty thousand, five hundred forty".