70821966 has 16 divisors (see below), whose sum is σ = 149976144. Its totient is φ = 22218624.

The previous prime is 70821943. The next prime is 70821977. The reversal of 70821966 is 66912807.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 347065 + ... + 347268.

It is an arithmetic number, because the mean of its divisors is an integer number (9373509).

Almost surely, 2^70821966 is an apocalyptic number.

70821966 is an abundant number, since it is smaller than the sum of its proper divisors (79154178).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

70821966 is a wasteful number, since it uses less digits than its factorization.

70821966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 694355.

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 70821966 is about 8415.5787679755. The cubic root of 70821966 is about 413.7353789827.

The spelling of 70821966 in words is "seventy million, eight hundred twenty-one thousand, nine hundred sixty-six".