67161240 has 96 divisors (see below), whose sum is σ = 219613680. Its totient is φ = 17799936.

The previous prime is 67161233. The next prime is 67161247. The reversal of 67161240 is 4216176.

67161240 is a `hidden beast` number, since 6 + 7 + 1 + 612 + 40 = 666.

It is an interprime number because it is at equal distance from previous prime (67161233) and next prime (67161247).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67161247) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 70447 + ... + 71393.

Almost surely, 2^67161240 is an apocalyptic number.

67161240 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 67161240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109806840).

67161240 is an abundant number, since it is smaller than the sum of its proper divisors (152452440).

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

67161240 is a wasteful number, since it uses less digits than its factorization.

67161240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1161 (or 1154 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 67161240 is about 8195.1961538453. The cubic root of 67161240 is about 406.4803619730.

The spelling of 67161240 in words is "sixty-seven million, one hundred sixty-one thousand, two hundred forty".