150166111666 has 4 divisors (see below), whose sum is σ = 225249167502. Its totient is φ = 75083055832.

The previous prime is 150166111661. The next prime is 150166111673. The reversal of 150166111666 is 666111661051.

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., 94108446441 + 56057665225 = 306771^2 + 236765^2 .

It is a super-2 number, since 2×150166111666² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (150166111661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37541527915 + ... + 37541527918.

Almost surely, 2^150166111666 is an apocalyptic number.

150166111666 is a deficient number, since it is larger than the sum of its proper divisors (75083055836).

150166111666 is an equidigital number, since it uses as much as digits as its factorization.

150166111666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75083055835.

The product of its (nonzero) digits is 38880, while the sum is 40.

The spelling of 150166111666 in words is "one hundred fifty billion, one hundred sixty-six million, one hundred eleven thousand, six hundred sixty-six".