65764949 has 4 divisors (see below), whose sum is σ = 66047436. Its totient is φ = 65482464.

The previous prime is 65764939. The next prime is 65764961. The reversal of 65764949 is 94946756.

65764949 = 411² + 412² + ... + 643².

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 23280625 + 42484324 = 4825^2 + 6518^2 .

It is a cyclic number.

It is not a de Polignac number, because 65764949 - 2⁸ = 65764693 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 65764897 and 65764906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65764939) 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, 140894 + ... + 141359.

It is an arithmetic number, because the mean of its divisors is an integer number (16511859).

Almost surely, 2^65764949 is an apocalyptic number.

It is an amenable number.

65764949 is a deficient number, since it is larger than the sum of its proper divisors (282487).

65764949 is a wasteful number, since it uses less digits than its factorization.

65764949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282486.

The product of its digits is 1632960, while the sum is 50.

The square root of 65764949 is about 8109.5591125535. The cubic root of 65764949 is about 403.6436851972.

The spelling of 65764949 in words is "sixty-five million, seven hundred sixty-four thousand, nine hundred forty-nine".