69664950 has 72 divisors (see below), whose sum is σ = 188604000. Its totient is φ = 18434880.

The previous prime is 69664939. The next prime is 69664981. The reversal of 69664950 is 5946696.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a junction number, because it is equal to n+sod(n) for n = 69664896 and 69664905.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 66531 + ... + 67569.

It is an arithmetic number, because the mean of its divisors is an integer number (2619500).

Almost surely, 2^69664950 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 69664950, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94302000).

69664950 is an abundant number, since it is smaller than the sum of its proper divisors (118939050).

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

69664950 is a wasteful number, since it uses less digits than its factorization.

69664950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1206 (or 1198 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 45.

The square root of 69664950 is about 8346.5531808046. The cubic root of 69664950 is about 411.4699368338.

The spelling of 69664950 in words is "sixty-nine million, six hundred sixty-four thousand, nine hundred fifty".