65977537 has 2 divisors, whose sum is σ = 65977538. Its totient is φ = 65977536.

The previous prime is 65977511. The next prime is 65977553. The reversal of 65977537 is 73577956.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65950641 + 26896 = 8121^2 + 164^2 .

It is a cyclic number.

It is not a de Polignac number, because 65977537 - 2¹¹ = 65975489 is a prime.

It is not a weakly prime, because it can be changed into another prime (65977567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32988768 + 32988769.

It is an arithmetic number, because the mean of its divisors is an integer number (32988769).

Almost surely, 2^65977537 is an apocalyptic number.

It is an amenable number.

65977537 is a deficient number, since it is larger than the sum of its proper divisors (1).

65977537 is an equidigital number, since it uses as much as digits as its factorization.

65977537 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1389150, while the sum is 49.

The square root of 65977537 is about 8122.6557849019. The cubic root of 65977537 is about 404.0781491959.

The spelling of 65977537 in words is "sixty-five million, nine hundred seventy-seven thousand, five hundred thirty-seven".