64040070666637 has 16 divisors (see below), whose sum is σ = 68997979290240. Its totient is φ = 59086701559872.

The previous prime is 64040070666589. The next prime is 64040070666641. The reversal of 64040070666637 is 73666607004046.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 64040070666637 - 2¹¹ = 64040070664589 is a prime.

It is a super-2 number, since 2×64040070666637² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64040070666937) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 435043314 + ... + 435190492.

It is an arithmetic number, because the mean of its divisors is an integer number (4312373705640).

Almost surely, 2^{64040070666637} is an apocalyptic number.

It is an amenable number.

64040070666637 is a deficient number, since it is larger than the sum of its proper divisors (4957908623603).

64040070666637 is a wasteful number, since it uses less digits than its factorization.

64040070666637 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162372.

The product of its (nonzero) digits is 18289152, while the sum is 55.

The spelling of 64040070666637 in words is "sixty-four trillion, forty billion, seventy million, six hundred sixty-six thousand, six hundred thirty-seven".