65420619 has 8 divisors (see below), whose sum is σ = 95157312. Its totient is φ = 39648840.

The previous prime is 65420567. The next prime is 65420623. The reversal of 65420619 is 91602456.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 65420619 - 2²¹ = 63323467 is a prime.

It is a super-2 number, since 2×65420619² = 8559714780686322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 1982443 = 65420619 / (6 + 5 + 4 + 2 + 0 + 6 + 1 + 9).

It is a self number, because there is not a number n which added to its sum of digits gives 65420619.

It is not an unprimeable number, because it can be changed into a prime (65420659) 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, 991189 + ... + 991254.

It is an arithmetic number, because the mean of its divisors is an integer number (11894664).

Almost surely, 2^65420619 is an apocalyptic number.

65420619 is a deficient number, since it is larger than the sum of its proper divisors (29736693).

65420619 is a wasteful number, since it uses less digits than its factorization.

65420619 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1982457.

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 65420619 is about 8088.3013667890. The cubic root of 65420619 is about 402.9379906110.

The spelling of 65420619 in words is "sixty-five million, four hundred twenty thousand, six hundred nineteen".