70680021 has 8 divisors (see below), whose sum is σ = 94521024. Its totient is φ = 46979520.

The previous prime is 70680013. The next prime is 70680041. The reversal of 70680021 is 12008607.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 70680021 - 2³ = 70680013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 70679973 and 70680000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70680041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33945 + ... + 35966.

It is an arithmetic number, because the mean of its divisors is an integer number (11815128).

Almost surely, 2^70680021 is an apocalyptic number.

It is an amenable number.

70680021 is a deficient number, since it is larger than the sum of its proper divisors (23841003).

70680021 is a wasteful number, since it uses less digits than its factorization.

70680021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70251.

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 70680021 is about 8407.1410717318. The cubic root of 70680021 is about 413.4587842555.

Adding to 70680021 its reverse (12008607), we get a palindrome (82688628).

The spelling of 70680021 in words is "seventy million, six hundred eighty thousand, twenty-one".