65997545477 has 8 divisors (see below), whose sum is σ = 70468563264. Its totient is φ = 61659991008.

The previous prime is 65997545473. The next prime is 65997545489. The reversal of 65997545477 is 77454579956.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 65997545477 - 2² = 65997545473 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 (65997545473) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33364808 + ... + 33366785.

It is an arithmetic number, because the mean of its divisors is an integer number (8808570408).

Almost surely, 2^65997545477 is an apocalyptic number.

It is an amenable number.

65997545477 is a deficient number, since it is larger than the sum of its proper divisors (4471017787).

65997545477 is a wasteful number, since it uses less digits than its factorization.

65997545477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66731659.

The product of its digits is 333396000, while the sum is 68.

The spelling of 65997545477 in words is "sixty-five billion, nine hundred ninety-seven million, five hundred forty-five thousand, four hundred seventy-seven".