149170725666 has 12 divisors (see below), whose sum is σ = 323203238982. Its totient is φ = 49723575216.

The previous prime is 149170725659. The next prime is 149170725667. The reversal of 149170725666 is 666527071941.

It can be written as a sum of positive squares in only one way, i.e., 99211770441 + 49958955225 = 314979^2 + 223515^2 .

It is a super-2 number, since 2×149170725666² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (149170725667) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4143631251 + ... + 4143631286.

Almost surely, 2^149170725666 is an apocalyptic number.

149170725666 is an abundant number, since it is smaller than the sum of its proper divisors (174032513316).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

149170725666 is a wasteful number, since it uses less digits than its factorization.

149170725666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8287262545 (or 8287262542 counting only the distinct ones).

The product of its (nonzero) digits is 3810240, while the sum is 54.

The spelling of 149170725666 in words is "one hundred forty-nine billion, one hundred seventy million, seven hundred twenty-five thousand, six hundred sixty-six".