66767140 has 48 divisors (see below), whose sum is σ = 161017920. Its totient is φ = 22999680.

The previous prime is 66767131. The next prime is 66767189. The reversal of 66767140 is 4176766.

It is a self number, because there is not a number n which added to its sum of digits gives 66767140.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3807 + ... + 12166.

It is an arithmetic number, because the mean of its divisors is an integer number (3354540).

Almost surely, 2^66767140 is an apocalyptic number.

It is an amenable number.

66767140 is an abundant number, since it is smaller than the sum of its proper divisors (94250780).

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

66767140 is a wasteful number, since it uses less digits than its factorization.

66767140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16012 (or 16010 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 37.

The square root of 66767140 is about 8171.1162028208. The cubic root of 66767140 is about 405.6837304947.

The spelling of 66767140 in words is "sixty-six million, seven hundred sixty-seven thousand, one hundred forty".