70416581 has 4 divisors (see below), whose sum is σ = 70435200. Its totient is φ = 70397964.

The previous prime is 70416551. The next prime is 70416583. The reversal of 70416581 is 18561407.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 70416581 - 2⁶ = 70416517 is a prime.

It is a super-2 number, since 2×70416581² = 9916989759459122, which contains 22 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 (70416583) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1391 + ... + 11948.

It is an arithmetic number, because the mean of its divisors is an integer number (17608800).

Almost surely, 2^70416581 is an apocalyptic number.

It is an amenable number.

70416581 is a deficient number, since it is larger than the sum of its proper divisors (18619).

70416581 is a wasteful number, since it uses less digits than its factorization.

70416581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18618.

The product of its (nonzero) digits is 6720, while the sum is 32.

The square root of 70416581 is about 8391.4588123877. The cubic root of 70416581 is about 412.9444607526.

Adding to 70416581 its reverse (18561407), we get a palindrome (88977988).

The spelling of 70416581 in words is "seventy million, four hundred sixteen thousand, five hundred eighty-one".