149698043666 has 4 divisors (see below), whose sum is σ = 224547065502. Its totient is φ = 74849021832.

The previous prime is 149698043591. The next prime is 149698043669. The reversal of 149698043666 is 666340896941.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 666340896941 = 3083 ⋅216133927.

It can be written as a sum of positive squares in only one way, i.e., 149378385025 + 319658641 = 386495^2 + 17879^2 .

It is a junction number, because it is equal to n+sod(n) for n = 149698043599 and 149698043608.

It is not an unprimeable number, because it can be changed into a prime (149698043669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37424510915 + ... + 37424510918.

Almost surely, 2^149698043666 is an apocalyptic number.

149698043666 is a deficient number, since it is larger than the sum of its proper divisors (74849021836).

149698043666 is an equidigital number, since it uses as much as digits as its factorization.

149698043666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74849021835.

The product of its (nonzero) digits is 40310784, while the sum is 62.

The spelling of 149698043666 in words is "one hundred forty-nine billion, six hundred ninety-eight million, forty-three thousand, six hundred sixty-six".