70571661 has 8 divisors (see below), whose sum is σ = 94145760. Its totient is φ = 47022672.

The previous prime is 70571653. The next prime is 70571689. The reversal of 70571661 is 16617507.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 70571661 - 2³ = 70571653 is a prime.

It is a super-3 number, since 3×70571661³ (a number of 25 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70571621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1750 + ... + 12008.

It is an arithmetic number, because the mean of its divisors is an integer number (11768220).

Almost surely, 2^70571661 is an apocalyptic number.

It is an amenable number.

70571661 is a deficient number, since it is larger than the sum of its proper divisors (23574099).

70571661 is a wasteful number, since it uses less digits than its factorization.

70571661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12555.

The product of its (nonzero) digits is 8820, while the sum is 33.

The square root of 70571661 is about 8400.6940784676. The cubic root of 70571661 is about 413.2473840683.

The spelling of 70571661 in words is "seventy million, five hundred seventy-one thousand, six hundred sixty-one".