65643402 has 32 divisors (see below), whose sum is σ = 147098304. Its totient is φ = 19353600.

The previous prime is 65643401. The next prime is 65643407. The reversal of 65643402 is 20434656.

It is a super-3 number, since 3×65643402³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 65643402.

It is not an unprimeable number, because it can be changed into a prime (65643401) 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, 10999 + ... + 15882.

It is an arithmetic number, because the mean of its divisors is an integer number (4596822).

Almost surely, 2^65643402 is an apocalyptic number.

65643402 is an abundant number, since it is smaller than the sum of its proper divisors (81454902).

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

65643402 is a wasteful number, since it uses less digits than its factorization.

65643402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26934.

The product of its (nonzero) digits is 17280, while the sum is 30.

The square root of 65643402 is about 8102.0615894968. The cubic root of 65643402 is about 403.3948599686.

The spelling of 65643402 in words is "sixty-five million, six hundred forty-three thousand, four hundred two".