49666690 has 16 divisors (see below), whose sum is σ = 94659192. Its totient is φ = 18697984.

The previous prime is 49666679. The next prime is 49666697. The reversal of 49666690 is 9666694.

It can be written as a sum of positive squares in 4 ways, for example, as 43678881 + 5987809 = 6609^2 + 2447^2 .

It is a super-2 number, since 2×49666690² = 4933560191112200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 49666690.

It is not an unprimeable number, because it can be changed into a prime (49666697) 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, 145909 + ... + 146248.

Almost surely, 2^49666690 is an apocalyptic number.

49666690 is a deficient number, since it is larger than the sum of its proper divisors (44992502).

49666690 is a wasteful number, since it uses less digits than its factorization.

49666690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292181.

The product of its (nonzero) digits is 419904, while the sum is 46.

The square root of 49666690 is about 7047.4598260650. The cubic root of 49666690 is about 367.5827077180.

The spelling of 49666690 in words is "forty-nine million, six hundred sixty-six thousand, six hundred ninety".