70664730 has 64 divisors (see below), whose sum is σ = 176335488. Its totient is φ = 18109440.

The previous prime is 70664729. The next prime is 70664731. The reversal of 70664730 is 3746607.

It is an interprime number because it is at equal distance from previous prime (70664729) and next prime (70664731).

It is a junction number, because it is equal to n+sod(n) for n = 70664691 and 70664700.

It is not an unprimeable number, because it can be changed into a prime (70664731) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 89397 + ... + 90183.

It is an arithmetic number, because the mean of its divisors is an integer number (2755242).

Almost surely, 2^70664730 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 70664730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88167744).

70664730 is an abundant number, since it is smaller than the sum of its proper divisors (105670758).

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

70664730 is a wasteful number, since it uses less digits than its factorization.

70664730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 911.

The product of its (nonzero) digits is 21168, while the sum is 33.

The square root of 70664730 is about 8406.2316170803. The cubic root of 70664730 is about 413.4289660496.

The spelling of 70664730 in words is "seventy million, six hundred sixty-four thousand, seven hundred thirty".