65426399 has 4 divisors (see below), whose sum is σ = 67536960. Its totient is φ = 63315840.

The previous prime is 65426393. The next prime is 65426401. The reversal of 65426399 is 99362456.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 65426399 - 2¹² = 65422303 is a prime.

It is a super-2 number, since 2×65426399² = 8561227372214402, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65426393) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1055234 + ... + 1055295.

It is an arithmetic number, because the mean of its divisors is an integer number (16884240).

Almost surely, 2^65426399 is an apocalyptic number.

65426399 is a deficient number, since it is larger than the sum of its proper divisors (2110561).

65426399 is a wasteful number, since it uses less digits than its factorization.

65426399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2110560.

The product of its digits is 349920, while the sum is 44.

The square root of 65426399 is about 8088.6586650693. The cubic root of 65426399 is about 402.9498569667.

The spelling of 65426399 in words is "sixty-five million, four hundred twenty-six thousand, three hundred ninety-nine".