65220406 has 4 divisors (see below), whose sum is σ = 97830612. Its totient is φ = 32610202.

The previous prime is 65220401. The next prime is 65220437. The reversal of 65220406 is 60402256.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65220401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16305100 + ... + 16305103.

It is an arithmetic number, because the mean of its divisors is an integer number (24457653).

Almost surely, 2^65220406 is an apocalyptic number.

65220406 is a deficient number, since it is larger than the sum of its proper divisors (32610206).

65220406 is a wasteful number, since it uses less digits than its factorization.

65220406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32610205.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 65220406 is about 8075.9151803371. The cubic root of 65220406 is about 402.5265206346.

The spelling of 65220406 in words is "sixty-five million, two hundred twenty thousand, four hundred six".