64699671 has 8 divisors (see below), whose sum is σ = 91340784. Its totient is φ = 40595840.

The previous prime is 64699669. The next prime is 64699703. The reversal of 64699671 is 17699646.

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

It is a cyclic number.

It is not a de Polignac number, because 64699671 - 2¹ = 64699669 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 64699671.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64699631) 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 7 ways as a sum of consecutive naturals, for example, 634260 + ... + 634361.

It is an arithmetic number, because the mean of its divisors is an integer number (11417598).

Almost surely, 2^64699671 is an apocalyptic number.

64699671 is a deficient number, since it is larger than the sum of its proper divisors (26641113).

64699671 is a wasteful number, since it uses less digits than its factorization.

64699671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1268641.

The product of its digits is 489888, while the sum is 48.

The square root of 64699671 is about 8043.6105698871. The cubic root of 64699671 is about 401.4523681014.

The spelling of 64699671 in words is "sixty-four million, six hundred ninety-nine thousand, six hundred seventy-one".