64963906 has 12 divisors (see below), whose sum is σ = 113355558. Its totient is φ = 27841632.

The previous prime is 64963883. The next prime is 64963909. The reversal of 64963906 is 60936946.

It can be written as a sum of positive squares in only one way, i.e., 60699681 + 4264225 = 7791^2 + 2065^2 .

It is a super-3 number, since 3×64963906³ (a number of 24 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (64963909) 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, 331351 + ... + 331546.

Almost surely, 2^64963906 is an apocalyptic number.

64963906 is a deficient number, since it is larger than the sum of its proper divisors (48391652).

64963906 is a wasteful number, since it uses less digits than its factorization.

64963906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 662913 (or 662906 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 43.

The square root of 64963906 is about 8060.0189826079. The cubic root of 64963906 is about 401.9981394764.

The spelling of 64963906 in words is "sixty-four million, nine hundred sixty-three thousand, nine hundred six".