65871740 has 24 divisors (see below), whose sum is σ = 150906672. Its totient is φ = 23953280.

The previous prime is 65871737. The next prime is 65871761. The reversal of 65871740 is 4717856.

It is a super-2 number, since 2×65871740² = 8678172261255200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 65871694 and 65871703.

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, 149489 + ... + 149928.

It is an arithmetic number, because the mean of its divisors is an integer number (6287778).

Almost surely, 2^65871740 is an apocalyptic number.

It is an amenable number.

65871740 is an abundant number, since it is smaller than the sum of its proper divisors (85034932).

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

65871740 is a wasteful number, since it uses less digits than its factorization.

65871740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299437 (or 299435 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 38.

The square root of 65871740 is about 8116.1407084895. The cubic root of 65871740 is about 403.8620497540.

The spelling of 65871740 in words is "sixty-five million, eight hundred seventy-one thousand, seven hundred forty".