65724994 has 4 divisors (see below), whose sum is σ = 98587494. Its totient is φ = 32862496.

The previous prime is 65724979. The next prime is 65725001. The reversal of 65724994 is 49942756.

65724994 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in only one way, i.e., 63282025 + 2442969 = 7955^2 + 1563^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16431247 + ... + 16431250.

Almost surely, 2^65724994 is an apocalyptic number.

65724994 is a deficient number, since it is larger than the sum of its proper divisors (32862500).

65724994 is a wasteful number, since it uses less digits than its factorization.

65724994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32862499.

The product of its digits is 544320, while the sum is 46.

The square root of 65724994 is about 8107.0952874627. The cubic root of 65724994 is about 403.5619250759.

It can be divided in two parts, 657 and 24994, that added together give a triangular number (25651 = T₂₂₆).

The spelling of 65724994 in words is "sixty-five million, seven hundred twenty-four thousand, nine hundred ninety-four".