70305665 has 4 divisors (see below), whose sum is σ = 84366804. Its totient is φ = 56244528.

The previous prime is 70305629. The next prime is 70305667. The reversal of 70305665 is 56650307.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 23902321 + 46403344 = 4889^2 + 6812^2 .

It is a cyclic number.

It is not a de Polignac number, because 70305665 - 2⁶ = 70305601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70305667) 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, 7030562 + ... + 7030571.

It is an arithmetic number, because the mean of its divisors is an integer number (21091701).

Almost surely, 2^70305665 is an apocalyptic number.

It is an amenable number.

70305665 is a deficient number, since it is larger than the sum of its proper divisors (14061139).

70305665 is a wasteful number, since it uses less digits than its factorization.

70305665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14061138.

The product of its (nonzero) digits is 18900, while the sum is 32.

The square root of 70305665 is about 8384.8473450624. The cubic root of 70305665 is about 412.7275316502.

The spelling of 70305665 in words is "seventy million, three hundred five thousand, six hundred sixty-five".