65945670 has 96 divisors (see below), whose sum is σ = 186206688. Its totient is φ = 14902272.

The previous prime is 65945651. The next prime is 65945689. The reversal of 65945670 is 7654956.

It is an interprime number because it is at equal distance from previous prime (65945651) and next prime (65945689).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 165912 + ... + 166308.

It is an arithmetic number, because the mean of its divisors is an integer number (1939653).

Almost surely, 2^65945670 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65945670, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93103344).

65945670 is an abundant number, since it is smaller than the sum of its proper divisors (120261018).

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

65945670 is a wasteful number, since it uses less digits than its factorization.

65945670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 534 (or 527 counting only the distinct ones).

The product of its (nonzero) digits is 226800, while the sum is 42.

The square root of 65945670 is about 8120.6939358653. The cubic root of 65945670 is about 404.0130824440.

It can be divided in two parts, 659456 and 70, that added together give a triangular number (659526 = T₁₁₄₈).

The spelling of 65945670 in words is "sixty-five million, nine hundred forty-five thousand, six hundred seventy".