64626005 has 4 divisors (see below), whose sum is σ = 77551212. Its totient is φ = 51700800.

The previous prime is 64625983. The next prime is 64626017. The reversal of 64626005 is 50062646.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50062646 = 2 ⋅25031323.

It can be written as a sum of positive squares in 2 ways, for example, as 23435281 + 41190724 = 4841^2 + 6418^2 .

It is not a de Polignac number, because 64626005 - 2⁶ = 64625941 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 3 ways as a sum of consecutive naturals, for example, 6462596 + ... + 6462605.

It is an arithmetic number, because the mean of its divisors is an integer number (19387803).

Almost surely, 2^64626005 is an apocalyptic number.

It is an amenable number.

64626005 is a deficient number, since it is larger than the sum of its proper divisors (12925207).

64626005 is a wasteful number, since it uses less digits than its factorization.

64626005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12925206.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 64626005 is about 8039.0301031903. The cubic root of 64626005 is about 401.2999478458.

The spelling of 64626005 in words is "sixty-four million, six hundred twenty-six thousand, five".