65661334 has 4 divisors (see below), whose sum is σ = 98492004. Its totient is φ = 32830666.

The previous prime is 65661331. The next prime is 65661341. The reversal of 65661334 is 43316656.

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

It is a super-2 number, since 2×65661334² = 8622821565319112, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 65661334.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65661331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16415332 + ... + 16415335.

It is an arithmetic number, because the mean of its divisors is an integer number (24623001).

Almost surely, 2^65661334 is an apocalyptic number.

65661334 is a deficient number, since it is larger than the sum of its proper divisors (32830670).

65661334 is a wasteful number, since it uses less digits than its factorization.

65661334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32830669.

The product of its digits is 38880, while the sum is 34.

The square root of 65661334 is about 8103.1681458551. The cubic root of 65661334 is about 403.4315888087.

The spelling of 65661334 in words is "sixty-five million, six hundred sixty-one thousand, three hundred thirty-four".