70661808 has 100 divisors (see below), whose sum is σ = 233762320. Its totient is φ = 20186496.

The previous prime is 70661807. The next prime is 70661831. The reversal of 70661808 is 80816607.

It is a super-2 number, since 2×70661808² = 9986182219657728, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (70661807) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 5178 + ... + 12966.

Almost surely, 2^70661808 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 70661808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (116881160).

70661808 is an abundant number, since it is smaller than the sum of its proper divisors (163100512).

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

70661808 is a wasteful number, since it uses less digits than its factorization.

70661808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7816 (or 7801 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 70661808 is about 8406.0578156470. The cubic root of 70661808 is about 413.4232675157.

The spelling of 70661808 in words is "seventy million, six hundred sixty-one thousand, eight hundred eight".