65816072477 has 4 divisors (see below), whose sum is σ = 66318485376. Its totient is φ = 65313659580.

The previous prime is 65816072471. The next prime is 65816072479. The reversal of 65816072477 is 77427061856.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 65816072477 - 2⁴ = 65816072461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65816072471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 251206253 + ... + 251206514.

It is an arithmetic number, because the mean of its divisors is an integer number (16579621344).

Almost surely, 2^65816072477 is an apocalyptic number.

It is an amenable number.

65816072477 is a deficient number, since it is larger than the sum of its proper divisors (502412899).

65816072477 is a wasteful number, since it uses less digits than its factorization.

65816072477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 502412898.

The product of its (nonzero) digits is 3951360, while the sum is 53.

The spelling of 65816072477 in words is "sixty-five billion, eight hundred sixteen million, seventy-two thousand, four hundred seventy-seven".