65977901 has 16 divisors (see below), whose sum is σ = 76489920. Its totient is φ = 56244480.

The previous prime is 65977843. The next prime is 65977909. The reversal of 65977901 is 10977956.

It is a cyclic number.

It is not a de Polignac number, because 65977901 - 2¹⁴ = 65961517 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 (65977909) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72290 + ... + 73196.

It is an arithmetic number, because the mean of its divisors is an integer number (4780620).

Almost surely, 2^65977901 is an apocalyptic number.

It is an amenable number.

65977901 is a deficient number, since it is larger than the sum of its proper divisors (10512019).

65977901 is a wasteful number, since it uses less digits than its factorization.

65977901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1324.

The product of its (nonzero) digits is 119070, while the sum is 44.

The square root of 65977901 is about 8122.6781913357. The cubic root of 65977901 is about 404.0788922982.

Subtracting from 65977901 its reverse (10977956), we obtain a palindrome (54999945).

The spelling of 65977901 in words is "sixty-five million, nine hundred seventy-seven thousand, nine hundred one".