70665120 has 144 divisors (see below), whose sum is σ = 249080832. Its totient is φ = 18224640.

The previous prime is 70665113. The next prime is 70665139. The reversal of 70665120 is 2156607.

70665120 is a `hidden beast` number, since 7 + 0 + 6 + 651 + 2 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a super-2 number, since 2×70665120² = 9987118369228800, which contains 22 as substring.

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, 43849 + ... + 45431.

It is an arithmetic number, because the mean of its divisors is an integer number (1729728).

Almost surely, 2^70665120 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 70665120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (124540416).

70665120 is an abundant number, since it is smaller than the sum of its proper divisors (178415712).

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

70665120 is a wasteful number, since it uses less digits than its factorization.

70665120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1635 (or 1624 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 70665120 is about 8406.2548141250. The cubic root of 70665120 is about 413.4297266224.

The spelling of 70665120 in words is "seventy million, six hundred sixty-five thousand, one hundred twenty".