70666121 has 4 divisors (see below), whose sum is σ = 71824644. Its totient is φ = 69507600.

The previous prime is 70666109. The next prime is 70666133. The reversal of 70666121 is 12166607.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (70666109) and next prime (70666133).

It can be written as a sum of positive squares in 2 ways, for example, as 1177225 + 69488896 = 1085^2 + 8336^2 .

It is a cyclic number.

It is not a de Polignac number, because 70666121 - 2¹⁰ = 70665097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70666021) 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, 579170 + ... + 579291.

It is an arithmetic number, because the mean of its divisors is an integer number (17956161).

Almost surely, 2^70666121 is an apocalyptic number.

It is an amenable number.

70666121 is a deficient number, since it is larger than the sum of its proper divisors (1158523).

70666121 is a wasteful number, since it uses less digits than its factorization.

70666121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1158522.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 70666121 is about 8406.3143529135. The cubic root of 70666121 is about 413.4316787462.

The spelling of 70666121 in words is "seventy million, six hundred sixty-six thousand, one hundred twenty-one".