666520070 has 16 divisors (see below), whose sum is σ = 1208495808. Its totient is φ = 264661440.

The previous prime is 666520069. The next prime is 666520117. The reversal of 666520070 is 70025666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 241886 + ... + 244625.

It is an arithmetic number, because the mean of its divisors is an integer number (75530988).

Almost surely, 2^666520070 is an apocalyptic number.

666520070 is a deficient number, since it is larger than the sum of its proper divisors (541975738).

666520070 is a wasteful number, since it uses less digits than its factorization.

666520070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 486655.

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 666520070 is about 25817.0499863947. The cubic root of 666520070 is about 873.5164280502.

The spelling of 666520070 in words is "six hundred sixty-six million, five hundred twenty thousand, seventy".