65917950 has 96 divisors (see below), whose sum is σ = 189821184. Its totient is φ = 14826240.

The previous prime is 65917949. The next prime is 65917981. The reversal of 65917950 is 5971956.

It is a super-2 number, since 2×65917950² = 8690352264405000, which contains 22 as substring.

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

It is a zygodrome in base 5.

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, 69882 + ... + 70818.

It is an arithmetic number, because the mean of its divisors is an integer number (1977304).

Almost surely, 2^65917950 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65917950, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94910592).

65917950 is an abundant number, since it is smaller than the sum of its proper divisors (123903234).

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

65917950 is a wasteful number, since it uses less digits than its factorization.

65917950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1026 (or 1021 counting only the distinct ones).

The product of its (nonzero) digits is 85050, while the sum is 42.

The square root of 65917950 is about 8118.9870057785. The cubic root of 65917950 is about 403.9564660799.

It can be divided in two parts, 6591 and 7950, that added together give a palindrome (14541).

The spelling of 65917950 in words is "sixty-five million, nine hundred seventeen thousand, nine hundred fifty".