65377709 has 8 divisors (see below), whose sum is σ = 66802680. Its totient is φ = 63968256.

The previous prime is 65377679. The next prime is 65377721. The reversal of 65377709 is 90777356.

It can be written as a sum of positive squares in 4 ways, for example, as 19096900 + 46280809 = 4370^2 + 6803^2 .

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 65377709 - 2⁸ = 65377453 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 65377709.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65377789) 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, 4847 + ... + 12419.

It is an arithmetic number, because the mean of its divisors is an integer number (8350335).

Almost surely, 2^65377709 is an apocalyptic number.

It is an amenable number.

65377709 is a deficient number, since it is larger than the sum of its proper divisors (1424971).

65377709 is an equidigital number, since it uses as much as digits as its factorization.

65377709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7759.

The product of its (nonzero) digits is 277830, while the sum is 44.

The square root of 65377709 is about 8085.6483351677. The cubic root of 65377709 is about 402.8498744021.

The spelling of 65377709 in words is "sixty-five million, three hundred seventy-seven thousand, seven hundred nine".