70621166665509 has 16 divisors (see below), whose sum is σ = 99139341350400. Its totient is φ = 44592980601456.

The previous prime is 70621166665507. The next prime is 70621166665549. The reversal of 70621166665509 is 90556666112607.

It is not a de Polignac number, because 70621166665509 - 2¹ = 70621166665507 is a prime.

It is a super-3 number, since 3×70621166665509³ (a number of 43 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70621166665501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 136705249 + ... + 137220870.

It is an arithmetic number, because the mean of its divisors is an integer number (6196208834400).

Almost surely, 2^{70621166665509} is an apocalyptic number.

It is an amenable number.

70621166665509 is a deficient number, since it is larger than the sum of its proper divisors (28518174684891).

70621166665509 is a wasteful number, since it uses less digits than its factorization.

70621166665509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273930664.

The product of its (nonzero) digits is 24494400, while the sum is 60.

The spelling of 70621166665509 in words is "seventy trillion, six hundred twenty-one billion, one hundred sixty-six million, six hundred sixty-five thousand, five hundred nine".