64666514 has 12 divisors (see below), whose sum is σ = 106619982. Its totient is φ = 29393760.

The previous prime is 64666513. The next prime is 64666517. The reversal of 64666514 is 41566646.

It can be written as a sum of positive squares in only one way, i.e., 36204289 + 28462225 = 6017^2 + 5335^2 .

It is not an unprimeable number, because it can be changed into a prime (64666513) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 133367 + ... + 133850.

Almost surely, 2^64666514 is an apocalyptic number.

64666514 is a deficient number, since it is larger than the sum of its proper divisors (41953468).

64666514 is a wasteful number, since it uses less digits than its factorization.

64666514 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267241 (or 267230 counting only the distinct ones).

The product of its digits is 103680, while the sum is 38.

The square root of 64666514 is about 8041.5492288489. The cubic root of 64666514 is about 401.3837782078.

The spelling of 64666514 in words is "sixty-four million, six hundred sixty-six thousand, five hundred fourteen".