70666891357 has 4 divisors (see below), whose sum is σ = 70704865756. Its totient is φ = 70628916960.

The previous prime is 70666891343. The next prime is 70666891363. The reversal of 70666891357 is 75319866607.

It is a happy number.

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 239816196 + 70427075161 = 15486^2 + 265381^2 .

It is a cyclic number.

It is not a de Polignac number, because 70666891357 - 2¹¹ = 70666889309 is a prime.

It is a super-3 number, since 3×70666891357³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70666894357) 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, 18984408 + ... + 18988129.

It is an arithmetic number, because the mean of its divisors is an integer number (17676216439).

Almost surely, 2^70666891357 is an apocalyptic number.

It is an amenable number.

70666891357 is a deficient number, since it is larger than the sum of its proper divisors (37974399).

70666891357 is a wasteful number, since it uses less digits than its factorization.

70666891357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37974398.

The product of its (nonzero) digits is 11430720, while the sum is 58.

The spelling of 70666891357 in words is "seventy billion, six hundred sixty-six million, eight hundred ninety-one thousand, three hundred fifty-seven".