65642974 has 4 divisors (see below), whose sum is σ = 98464464. Its totient is φ = 32821486.

The previous prime is 65642963. The next prime is 65642999. The reversal of 65642974 is 47924656.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 65642974.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16410742 + ... + 16410745.

It is an arithmetic number, because the mean of its divisors is an integer number (24616116).

Almost surely, 2^65642974 is an apocalyptic number.

65642974 is a deficient number, since it is larger than the sum of its proper divisors (32821490).

65642974 is a wasteful number, since it uses less digits than its factorization.

65642974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32821489.

The product of its digits is 362880, while the sum is 43.

The square root of 65642974 is about 8102.0351764233. The cubic root of 65642974 is about 403.3939832449.

The spelling of 65642974 in words is "sixty-five million, six hundred forty-two thousand, nine hundred seventy-four".