69997680 has 120 divisors (see below), whose sum is σ = 236770560. Its totient is φ = 18531840.

The previous prime is 69997663. The next prime is 69997709. The reversal of 69997680 is 8679996.

It is a tau number, because it is divible by the number of its divisors (120).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 137266 + ... + 137774.

It is an arithmetic number, because the mean of its divisors is an integer number (1973088).

Almost surely, 2^69997680 is an apocalyptic number.

69997680 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 69997680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (118385280).

69997680 is an abundant number, since it is smaller than the sum of its proper divisors (166772880).

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

69997680 is a wasteful number, since it uses less digits than its factorization.

69997680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 719 (or 710 counting only the distinct ones).

The product of its (nonzero) digits is 1469664, while the sum is 54.

The square root of 69997680 is about 8366.4616176733. The cubic root of 69997680 is about 412.1239768916.

The spelling of 69997680 in words is "sixty-nine million, nine hundred ninety-seven thousand, six hundred eighty".