66703760 has 40 divisors (see below), whose sum is σ = 155823360. Its totient is φ = 26554752.

The previous prime is 66703757. The next prime is 66703771. The reversal of 66703760 is 6730766.

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 66703760.

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, 15971 + ... + 19709.

It is an arithmetic number, because the mean of its divisors is an integer number (3895584).

Almost surely, 2^66703760 is an apocalyptic number.

It is an amenable number.

66703760 is an abundant number, since it is smaller than the sum of its proper divisors (89119600).

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

66703760 is a wasteful number, since it uses less digits than its factorization.

66703760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3975 (or 3969 counting only the distinct ones).

The product of its (nonzero) digits is 31752, while the sum is 35.

The square root of 66703760 is about 8167.2369868885. The cubic root of 66703760 is about 405.5553221436. Note that the first 3 decimals are identical.

The spelling of 66703760 in words is "sixty-six million, seven hundred three thousand, seven hundred sixty".