64680557 has 8 divisors (see below), whose sum is σ = 67272480. Its totient is φ = 62138160.

The previous prime is 64680533. The next prime is 64680559. The reversal of 64680557 is 75508646.

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 64680557 - 2¹⁶ = 64615021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64680559) 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, 9707 + ... + 14952.

It is an arithmetic number, because the mean of its divisors is an integer number (8409060).

Almost surely, 2^64680557 is an apocalyptic number.

It is an amenable number.

64680557 is a deficient number, since it is larger than the sum of its proper divisors (2591923).

64680557 is a wasteful number, since it uses less digits than its factorization.

64680557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24763.

The product of its (nonzero) digits is 201600, while the sum is 41.

The square root of 64680557 is about 8042.4223340981. The cubic root of 64680557 is about 401.4128309796.

The spelling of 64680557 in words is "sixty-four million, six hundred eighty thousand, five hundred fifty-seven".