64662406415 has 4 divisors (see below), whose sum is σ = 77594887704. Its totient is φ = 51729925128.

The previous prime is 64662406373. The next prime is 64662406427. The reversal of 64662406415 is 51460426646.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 64662406415 - 2²² = 64658212111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 6466240637 + ... + 6466240646.

It is an arithmetic number, because the mean of its divisors is an integer number (19398721926).

Almost surely, 2^64662406415 is an apocalyptic number.

64662406415 is a deficient number, since it is larger than the sum of its proper divisors (12932481289).

64662406415 is a wasteful number, since it uses less digits than its factorization.

64662406415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12932481288.

The product of its (nonzero) digits is 829440, while the sum is 44.

The spelling of 64662406415 in words is "sixty-four billion, six hundred sixty-two million, four hundred six thousand, four hundred fifteen".