67640142 has 8 divisors (see below), whose sum is σ = 135280296. Its totient is φ = 22546712.

The previous prime is 67640141. The next prime is 67640143. The reversal of 67640142 is 24104676.

It is an interprime number because it is at equal distance from previous prime (67640141) and next prime (67640143).

It is a sphenic number, since it is the product of 3 distinct primes.

67640142 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67640141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5636673 + ... + 5636684.

It is an arithmetic number, because the mean of its divisors is an integer number (16910037).

Almost surely, 2^67640142 is an apocalyptic number.

67640142 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

67640142 is a wasteful number, since it uses less digits than its factorization.

67640142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11273362.

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 67640142 is about 8224.3627108731. The cubic root of 67640142 is about 407.4442283817. Note that the first 3 decimals are identical.

The spelling of 67640142 in words is "sixty-seven million, six hundred forty thousand, one hundred forty-two".