65439670 has 16 divisors (see below), whose sum is σ = 117884160. Its totient is φ = 26155264.

The previous prime is 65439599. The next prime is 65439677. The reversal of 65439670 is 7693456.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65439677) 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, 21291 + ... + 24169.

It is an arithmetic number, because the mean of its divisors is an integer number (7367760).

Almost surely, 2^65439670 is an apocalyptic number.

65439670 is a deficient number, since it is larger than the sum of its proper divisors (52444490).

65439670 is a wasteful number, since it uses less digits than its factorization.

65439670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5159.

The product of its (nonzero) digits is 136080, while the sum is 40.

The square root of 65439670 is about 8089.4789696247. The cubic root of 65439670 is about 402.9770997215.

The spelling of 65439670 in words is "sixty-five million, four hundred thirty-nine thousand, six hundred seventy".