65216406 has 16 divisors (see below), whose sum is σ = 131310000. Its totient is φ = 21592608.

The previous prime is 65216399. The next prime is 65216413. The reversal of 65216406 is 60461256.

It is an interprime number because it is at equal distance from previous prime (65216399) and next prime (65216413).

It is a super-2 number, since 2×65216406² = 8506359223113672, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35581 + ... + 37368.

It is an arithmetic number, because the mean of its divisors is an integer number (8206875).

Almost surely, 2^65216406 is an apocalyptic number.

65216406 is an abundant number, since it is smaller than the sum of its proper divisors (66093594).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65216406 is a wasteful number, since it uses less digits than its factorization.

65216406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73103.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 65216406 is about 8075.6675265887. The cubic root of 65216406 is about 402.5182914157.

The spelling of 65216406 in words is "sixty-five million, two hundred sixteen thousand, four hundred six".