64776753 has 22 divisors (see below), whose sum is σ = 97253154. Its totient is φ = 43145136.

The previous prime is 64776721. The next prime is 64776773. The reversal of 64776753 is 35767746.

It can be written as a sum of positive squares in only one way, i.e., 49660209 + 15116544 = 7047^2 + 3888^2 .

It is not a de Polignac number, because 64776753 - 2⁵ = 64776721 is a prime.

It is a zygodrome in base 3.

It is a junction number, because it is equal to n+sod(n) for n = 64776699 and 64776708.

It is not an unprimeable number, because it can be changed into a prime (64776773) by changing a digit.

It is a polite number, since it can be written in 21 ways as a sum of consecutive naturals, for example, 58501 + ... + 59597.

Almost surely, 2^64776753 is an apocalyptic number.

It is an amenable number.

64776753 is a deficient number, since it is larger than the sum of its proper divisors (32476401).

64776753 is an frugal number, since it uses more digits than its factorization.

64776753 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1127 (or 1100 counting only the distinct ones).

The product of its digits is 740880, while the sum is 45.

The square root of 64776753 is about 8048.4006485761. The cubic root of 64776753 is about 401.6117324902.

The spelling of 64776753 in words is "sixty-four million, seven hundred seventy-six thousand, seven hundred fifty-three".