64740069 has 24 divisors (see below), whose sum is σ = 96494112. Its totient is φ = 41801760.

The previous prime is 64740037. The next prime is 64740119. The reversal of 64740069 is 96004746.

64740069 is a `hidden beast` number, since 647 + 4 + 0 + 0 + 6 + 9 = 666.

It is not a de Polignac number, because 64740069 - 2⁵ = 64740037 is a prime.

It is a super-2 number, since 2×64740069² = 8382553068249522, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64740019) 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, 50059 + ... + 51335.

It is an arithmetic number, because the mean of its divisors is an integer number (4020588).

Almost surely, 2^64740069 is an apocalyptic number.

It is an amenable number.

64740069 is a deficient number, since it is larger than the sum of its proper divisors (31754043).

64740069 is a wasteful number, since it uses less digits than its factorization.

64740069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1457 (or 1454 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 64740069 is about 8046.1213637379. The cubic root of 64740069 is about 401.5359053552.

The spelling of 64740069 in words is "sixty-four million, seven hundred forty thousand, sixty-nine".