64706518 has 4 divisors (see below), whose sum is σ = 97059780. Its totient is φ = 32353258.

The previous prime is 64706513. The next prime is 64706527. The reversal of 64706518 is 81560746.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64706513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16176628 + ... + 16176631.

It is an arithmetic number, because the mean of its divisors is an integer number (24264945).

Almost surely, 2^64706518 is an apocalyptic number.

64706518 is a deficient number, since it is larger than the sum of its proper divisors (32353262).

64706518 is a wasteful number, since it uses less digits than its factorization.

64706518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32353261.

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 64706518 is about 8044.0361759505. The cubic root of 64706518 is about 401.4665291596.

The spelling of 64706518 in words is "sixty-four million, seven hundred six thousand, five hundred eighteen".