66149908 has 24 divisors (see below), whose sum is σ = 130362624. Its totient is φ = 29097600.

The previous prime is 66149903. The next prime is 66149947. The reversal of 66149908 is 80994166.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66149903) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22885 + ... + 25612.

It is an arithmetic number, because the mean of its divisors is an integer number (5431776).

Almost surely, 2^66149908 is an apocalyptic number.

It is an amenable number.

66149908 is a deficient number, since it is larger than the sum of its proper divisors (64212716).

66149908 is a wasteful number, since it uses less digits than its factorization.

66149908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48543 (or 48541 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 43.

The square root of 66149908 is about 8133.2593712484. The cubic root of 66149908 is about 404.4297374755.

The spelling of 66149908 in words is "sixty-six million, one hundred forty-nine thousand, nine hundred eight".