64980661 has 8 divisors (see below), whose sum is σ = 65479680. Its totient is φ = 64484112.

The previous prime is 64980631. The next prime is 64980667. The reversal of 64980661 is 16608946.

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 64980661 - 2⁷ = 64980533 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 (64980667) 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, 135420 + ... + 135898.

It is an arithmetic number, because the mean of its divisors is an integer number (8184960).

Almost surely, 2^64980661 is an apocalyptic number.

It is an amenable number.

64980661 is a deficient number, since it is larger than the sum of its proper divisors (499019).

64980661 is a wasteful number, since it uses less digits than its factorization.

64980661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1235.

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 64980661 is about 8061.0583052103. The cubic root of 64980661 is about 402.0326966137.

The spelling of 64980661 in words is "sixty-four million, nine hundred eighty thousand, six hundred sixty-one".