65379999 has 16 divisors (see below), whose sum is σ = 90091008. Its totient is φ = 42142752.

The previous prime is 65379991. The next prime is 65380001. The reversal of 65379999 is 99997356.

It is not a de Polignac number, because 65379999 - 2³ = 65379991 is a prime.

65379999 is a modest number, since divided by 9999 gives 6537 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65379991) 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, 16774 + ... + 20300.

It is an arithmetic number, because the mean of its divisors is an integer number (5630688).

Almost surely, 2^65379999 is an apocalyptic number.

65379999 is a deficient number, since it is larger than the sum of its proper divisors (24711009).

65379999 is a wasteful number, since it uses less digits than its factorization.

65379999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3734.

The product of its digits is 4133430, while the sum is 57.

The square root of 65379999 is about 8085.7899428565. The cubic root of 65379999 is about 402.8545779188.

The spelling of 65379999 in words is "sixty-five million, three hundred seventy-nine thousand, nine hundred ninety-nine".