70021666556 has 12 divisors (see below), whose sum is σ = 122543100792. Its totient is φ = 35009352048.

The previous prime is 70021666541. The next prime is 70021666657. The reversal of 70021666556 is 65566612007.

It is a super-2 number, since 2×70021666556² (a number of 22 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 260315 + ... + 455858.

It is an arithmetic number, because the mean of its divisors is an integer number (10211925066).

Almost surely, 2^70021666556 is an apocalyptic number.

It is an amenable number.

70021666556 is a deficient number, since it is larger than the sum of its proper divisors (52521434236).

70021666556 is a wasteful number, since it uses less digits than its factorization.

70021666556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 740620 (or 740618 counting only the distinct ones).

The product of its (nonzero) digits is 453600, while the sum is 44.

The spelling of 70021666556 in words is "seventy billion, twenty-one million, six hundred sixty-six thousand, five hundred fifty-six".