66463753 has 4 divisors (see below), whose sum is σ = 66608388. Its totient is φ = 66319120.

The previous prime is 66463723. The next prime is 66463763. The reversal of 66463753 is 35736466.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 22014864 + 44448889 = 4692^2 + 6667^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66463753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66463723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71626 + ... + 72547.

It is an arithmetic number, because the mean of its divisors is an integer number (16652097).

Almost surely, 2^66463753 is an apocalyptic number.

It is an amenable number.

66463753 is a deficient number, since it is larger than the sum of its proper divisors (144635).

66463753 is a wasteful number, since it uses less digits than its factorization.

66463753 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144634.

The product of its digits is 272160, while the sum is 40.

The square root of 66463753 is about 8152.5304660578. The cubic root of 66463753 is about 405.0683276477.

The spelling of 66463753 in words is "sixty-six million, four hundred sixty-three thousand, seven hundred fifty-three".