124001666 has 4 divisors (see below), whose sum is σ = 186002502. Its totient is φ = 62000832.

The previous prime is 124001663. The next prime is 124001681. The reversal of 124001666 is 666100421.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 666100421 = 7 ⋅95157203.

It can be written as a sum of positive squares in only one way, i.e., 107019025 + 16982641 = 10345^2 + 4121^2 .

It is not an unprimeable number, because it can be changed into a prime (124001663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31000415 + ... + 31000418.

Almost surely, 2^124001666 is an apocalyptic number.

124001666 is a deficient number, since it is larger than the sum of its proper divisors (62000836).

124001666 is an equidigital number, since it uses as much as digits as its factorization.

124001666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62000835.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 124001666 is about 11135.6035310171. The cubic root of 124001666 is about 498.6653284739.

The spelling of 124001666 in words is "one hundred twenty-four million, one thousand, six hundred sixty-six".