64949975 has 12 divisors (see below), whose sum is σ = 81445680. Its totient is φ = 51374400.

The previous prime is 64949957. The next prime is 64949981. The reversal of 64949975 is 57994946.

It is not a de Polignac number, because 64949975 - 2⁸ = 64949719 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12371 + ... + 16820.

It is an arithmetic number, because the mean of its divisors is an integer number (6787140).

Almost surely, 2^64949975 is an apocalyptic number.

64949975 is a deficient number, since it is larger than the sum of its proper divisors (16495705).

64949975 is a wasteful number, since it uses less digits than its factorization.

64949975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29290 (or 29285 counting only the distinct ones).

The product of its digits is 2449440, while the sum is 53.

The square root of 64949975 is about 8059.1547323525. The cubic root of 64949975 is about 401.9694023064.

The spelling of 64949975 in words is "sixty-four million, nine hundred forty-nine thousand, nine hundred seventy-five".