64740575 has 6 divisors (see below), whose sum is σ = 80278344. Its totient is φ = 51792440.

The previous prime is 64740563. The next prime is 64740587. The reversal of 64740575 is 57504746.

It is an interprime number because it is at equal distance from previous prime (64740563) and next prime (64740587).

It is not a de Polignac number, because 64740575 - 2¹⁸ = 64478431 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1294787 + ... + 1294836.

It is an arithmetic number, because the mean of its divisors is an integer number (13379724).

Almost surely, 2^64740575 is an apocalyptic number.

64740575 is a deficient number, since it is larger than the sum of its proper divisors (15537769).

64740575 is a wasteful number, since it uses less digits than its factorization.

64740575 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2589633 (or 2589628 counting only the distinct ones).

The product of its (nonzero) digits is 117600, while the sum is 38.

The square root of 64740575 is about 8046.1528073981. The cubic root of 64740575 is about 401.5369514700.

The spelling of 64740575 in words is "sixty-four million, seven hundred forty thousand, five hundred seventy-five".