70885661 has 16 divisors (see below), whose sum is σ = 88816128. Its totient is φ = 54961200.

The previous prime is 70885649. The next prime is 70885667. The reversal of 70885661 is 16658807.

It is a de Polignac number, because none of the positive numbers 2^k-70885661 is a prime.

It is a super-3 number, since 3×70885661³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70885667) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14066 + ... + 18428.

It is an arithmetic number, because the mean of its divisors is an integer number (5551008).

Almost surely, 2^70885661 is an apocalyptic number.

It is an amenable number.

70885661 is a deficient number, since it is larger than the sum of its proper divisors (17930467).

70885661 is a wasteful number, since it uses less digits than its factorization.

70885661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4592.

The product of its (nonzero) digits is 80640, while the sum is 41.

The square root of 70885661 is about 8419.3622680106. The cubic root of 70885661 is about 413.8593752515.

The spelling of 70885661 in words is "seventy million, eight hundred eighty-five thousand, six hundred sixty-one".