64746787 has 6 divisors (see below), whose sum is σ = 75317748. Its totient is φ = 55497204.

The previous prime is 64746751. The next prime is 64746791. The reversal of 64746787 is 78764746.

It is a de Polignac number, because none of the positive numbers 2^k-64746787 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49), and also a Moran number because the ratio is a prime number: 1321363 = 64746787 / (6 + 4 + 7 + 4 + 6 + 7 + 8 + 7).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64746787.

It is not an unprimeable number, because it can be changed into a prime (64746287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 660633 + ... + 660730.

It is an arithmetic number, because the mean of its divisors is an integer number (12552958).

Almost surely, 2^64746787 is an apocalyptic number.

64746787 is a deficient number, since it is larger than the sum of its proper divisors (10570961).

64746787 is a wasteful number, since it uses less digits than its factorization.

64746787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1321377 (or 1321370 counting only the distinct ones).

The product of its digits is 1580544, while the sum is 49.

The square root of 64746787 is about 8046.5388211330. The cubic root of 64746787 is about 401.5497938426.

The spelling of 64746787 in words is "sixty-four million, seven hundred forty-six thousand, seven hundred eighty-seven".