64779745 has 8 divisors (see below), whose sum is σ = 77987520. Its totient is φ = 51655920.

The previous prime is 64779733. The next prime is 64779787. The reversal of 64779745 is 54797746.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 64779745 - 2⁹ = 64779233 is a prime.

It is a zygodrome in base 3.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19275 + ... + 22384.

It is an arithmetic number, because the mean of its divisors is an integer number (9748440).

Almost surely, 2^64779745 is an apocalyptic number.

It is an amenable number.

64779745 is a deficient number, since it is larger than the sum of its proper divisors (13207775).

64779745 is a wasteful number, since it uses less digits than its factorization.

64779745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41975.

The product of its digits is 1481760, while the sum is 49.

The square root of 64779745 is about 8048.5865218683. The cubic root of 64779745 is about 401.6179157980.

The spelling of 64779745 in words is "sixty-four million, seven hundred seventy-nine thousand, seven hundred forty-five".