64772081 has 8 divisors (see below), whose sum is σ = 70735584. Its totient is φ = 58821120.

The previous prime is 64772047. The next prime is 64772131. The reversal of 64772081 is 18027746.

It is a happy number.

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 64772081 - 2¹⁸ = 64509937 is a prime.

It is a super-2 number, since 2×64772081² = 8390844954141122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64772381) 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, 10130 + ... + 15236.

It is an arithmetic number, because the mean of its divisors is an integer number (8841948).

Almost surely, 2^64772081 is an apocalyptic number.

It is an amenable number.

64772081 is a deficient number, since it is larger than the sum of its proper divisors (5963503).

64772081 is a wasteful number, since it uses less digits than its factorization.

64772081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6271.

The product of its (nonzero) digits is 18816, while the sum is 35.

The square root of 64772081 is about 8048.1103993422. The cubic root of 64772081 is about 401.6020768908.

It can be divided in two parts, 6477 and 2081, that added together give a palindrome (8558).

The spelling of 64772081 in words is "sixty-four million, seven hundred seventy-two thousand, eighty-one".