69665140 has 12 divisors (see below), whose sum is σ = 146296836. Its totient is φ = 27866048.

The previous prime is 69665131. The next prime is 69665143. The reversal of 69665140 is 4156696.

It can be written as a sum of positive squares in 2 ways, for example, as 27311076 + 42354064 = 5226^2 + 6508^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 69665140.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (69665143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1741609 + ... + 1741648.

It is an arithmetic number, because the mean of its divisors is an integer number (12191403).

Almost surely, 2^69665140 is an apocalyptic number.

It is an amenable number.

69665140 is an abundant number, since it is smaller than the sum of its proper divisors (76631696).

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

69665140 is a wasteful number, since it uses less digits than its factorization.

69665140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3483266 (or 3483264 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 69665140 is about 8346.5645627408. The cubic root of 69665140 is about 411.4703109063.

The spelling of 69665140 in words is "sixty-nine million, six hundred sixty-five thousand, one hundred forty".