65940149 has 16 divisors (see below), whose sum is σ = 75423744. Its totient is φ = 57063600.

The previous prime is 65940139. The next prime is 65940163. The reversal of 65940149 is 94104956.

It is a de Polignac number, because none of the positive numbers 2^k-65940149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65940139) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66044 + ... + 67034.

It is an arithmetic number, because the mean of its divisors is an integer number (4713984).

Almost surely, 2^65940149 is an apocalyptic number.

It is an amenable number.

65940149 is a deficient number, since it is larger than the sum of its proper divisors (9483595).

65940149 is a wasteful number, since it uses less digits than its factorization.

65940149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1288.

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 65940149 is about 8120.3539947468. The cubic root of 65940149 is about 404.0018074128.

The spelling of 65940149 in words is "sixty-five million, nine hundred forty thousand, one hundred forty-nine".