70721066 has 16 divisors (see below), whose sum is σ = 114524928. Its totient is φ = 32559600.

The previous prime is 70721047. The next prime is 70721069. The reversal of 70721066 is 66012707.

It is not an unprimeable number, because it can be changed into a prime (70721069) 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, 8051 + ... + 14361.

It is an arithmetic number, because the mean of its divisors is an integer number (7157808).

Almost surely, 2^70721066 is an apocalyptic number.

70721066 is a deficient number, since it is larger than the sum of its proper divisors (43803862).

70721066 is a wasteful number, since it uses less digits than its factorization.

70721066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6757.

The product of its (nonzero) digits is 3528, while the sum is 29.

The square root of 70721066 is about 8409.5817969742. The cubic root of 70721066 is about 413.5388027747.

The spelling of 70721066 in words is "seventy million, seven hundred twenty-one thousand, sixty-six".