70290661 has 4 divisors (see below), whose sum is σ = 80332192. Its totient is φ = 60249132.

The previous prime is 70290659. The next prime is 70290679. The reversal of 70290661 is 16609207.

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 70290661 - 2¹ = 70290659 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70290611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5020755 + ... + 5020768.

It is an arithmetic number, because the mean of its divisors is an integer number (20083048).

Almost surely, 2^70290661 is an apocalyptic number.

It is an amenable number.

70290661 is a deficient number, since it is larger than the sum of its proper divisors (10041531).

70290661 is a wasteful number, since it uses less digits than its factorization.

70290661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10041530.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 70290661 is about 8383.9525881293. The cubic root of 70290661 is about 412.6981693673.

Adding to 70290661 its reverse (16609207), we get a palindrome (86899868).

The spelling of 70290661 in words is "seventy million, two hundred ninety thousand, six hundred sixty-one".