49999966 has 4 divisors (see below), whose sum is σ = 74999952. Its totient is φ = 24999982.

The previous prime is 49999921. The next prime is 49999991. The reversal of 49999966 is 66999994.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66999994 = 2 ⋅33499997.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12499990 + ... + 12499993.

It is an arithmetic number, because the mean of its divisors is an integer number (18749988).

Almost surely, 2^49999966 is an apocalyptic number.

49999966 is a deficient number, since it is larger than the sum of its proper divisors (24999986).

49999966 is a wasteful number, since it uses less digits than its factorization.

49999966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24999985.

The product of its digits is 8503056, while the sum is 61.

The square root of 49999966 is about 7071.0654077020. The cubic root of 49999966 is about 368.4030663593.

The spelling of 49999966 in words is "forty-nine million, nine hundred ninety-nine thousand, nine hundred sixty-six".