64940066 has 4 divisors (see below), whose sum is σ = 97410102. Its totient is φ = 32470032.

The previous prime is 64940059. The next prime is 64940087. The reversal of 64940066 is 66004946.

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

It can be written as a sum of positive squares in only one way, i.e., 54834025 + 10106041 = 7405^2 + 3179^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16235015 + ... + 16235018.

Almost surely, 2^64940066 is an apocalyptic number.

64940066 is a deficient number, since it is larger than the sum of its proper divisors (32470036).

64940066 is a wasteful number, since it uses less digits than its factorization.

64940066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32470035.

The product of its (nonzero) digits is 31104, while the sum is 35.

The square root of 64940066 is about 8058.5399421980. The cubic root of 64940066 is about 401.9489593045.

The spelling of 64940066 in words is "sixty-four million, nine hundred forty thousand, sixty-six".