2979729866 has 4 divisors (see below), whose sum is σ = 4469594802. Its totient is φ = 1489864932.

The previous prime is 2979729761. The next prime is 2979729869. The reversal of 2979729866 is 6689279792.

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

It can be written as a sum of positive squares in only one way, i.e., 2289144025 + 690585841 = 47845^2 + 26279^2 .

It is not an unprimeable number, because it can be changed into a prime (2979729869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 744932465 + ... + 744932468.

Almost surely, 2^2979729866 is an apocalyptic number.

2979729866 is a deficient number, since it is larger than the sum of its proper divisors (1489864936).

2979729866 is a wasteful number, since it uses less digits than its factorization.

2979729866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1489864935.

The product of its digits is 41150592, while the sum is 65.

The square root of 2979729866 is about 54586.9019637495. The cubic root of 2979729866 is about 1438.9939388006.

The spelling of 2979729866 in words is "two billion, nine hundred seventy-nine million, seven hundred twenty-nine thousand, eight hundred sixty-six".