70661305 has 32 divisors (see below), whose sum is σ = 102348288. Its totient is φ = 46137600.

The previous prime is 70661293. The next prime is 70661309. The reversal of 70661305 is 50316607.

It is not a de Polignac number, because 70661305 - 2⁷ = 70661177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70661309) 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 31 ways as a sum of consecutive naturals, for example, 25120 + ... + 27790.

It is an arithmetic number, because the mean of its divisors is an integer number (3198384).

Almost surely, 2^70661305 is an apocalyptic number.

It is an amenable number.

70661305 is a deficient number, since it is larger than the sum of its proper divisors (31686983).

70661305 is a wasteful number, since it uses less digits than its factorization.

70661305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2737.

The product of its (nonzero) digits is 3780, while the sum is 28.

The square root of 70661305 is about 8406.0278966941. The cubic root of 70661305 is about 413.4222865407.

The spelling of 70661305 in words is "seventy million, six hundred sixty-one thousand, three hundred five".