65977671 has 8 divisors (see below), whose sum is σ = 92600320. Its totient is φ = 41670072.

The previous prime is 65977669. The next prime is 65977679. The reversal of 65977671 is 17677956.

It is a happy number.

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

It is not a de Polignac number, because 65977671 - 2¹ = 65977669 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 65977671.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65977679) 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, 578695 + ... + 578808.

It is an arithmetic number, because the mean of its divisors is an integer number (11575040).

Almost surely, 2^65977671 is an apocalyptic number.

65977671 is a deficient number, since it is larger than the sum of its proper divisors (26622649).

65977671 is a wasteful number, since it uses less digits than its factorization.

65977671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1157525.

The product of its digits is 555660, while the sum is 48.

The square root of 65977671 is about 8122.6640334314. The cubic root of 65977671 is about 404.0784227559.

The spelling of 65977671 in words is "sixty-five million, nine hundred seventy-seven thousand, six hundred seventy-one".