66195408 has 20 divisors (see below), whose sum is σ = 171004928. Its totient is φ = 22065120.

The previous prime is 66195407. The next prime is 66195413. The reversal of 66195408 is 80459166.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66195407) 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, 689488 + ... + 689583.

Almost surely, 2^66195408 is an apocalyptic number.

It is an amenable number.

66195408 is an abundant number, since it is smaller than the sum of its proper divisors (104809520).

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

66195408 is a wasteful number, since it uses less digits than its factorization.

66195408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1379082 (or 1379076 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 39.

The square root of 66195408 is about 8136.0560470046. The cubic root of 66195408 is about 404.5224427473.

It can be divided in two parts, 661 and 95408, that added together give a palindrome (96069).

The spelling of 66195408 in words is "sixty-six million, one hundred ninety-five thousand, four hundred eight".