64973775 has 24 divisors (see below), whose sum is σ = 111131280. Its totient is φ = 33456640.

The previous prime is 64973771. The next prime is 64973803. The reversal of 64973775 is 57737946.

It is not a de Polignac number, because 64973775 - 2² = 64973771 is a prime.

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64973771) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12762 + ... + 17111.

It is an arithmetic number, because the mean of its divisors is an integer number (4630470).

Almost surely, 2^64973775 is an apocalyptic number.

64973775 is a deficient number, since it is larger than the sum of its proper divisors (46157505).

64973775 is a wasteful number, since it uses less digits than its factorization.

64973775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29915 (or 29910 counting only the distinct ones).

The product of its digits is 1111320, while the sum is 48.

The square root of 64973775 is about 8060.6311787601. The cubic root of 64973775 is about 402.0184949784.

The spelling of 64973775 in words is "sixty-four million, nine hundred seventy-three thousand, seven hundred seventy-five".