149558661 has 12 divisors (see below), whose sum is σ = 246890592. Its totient is φ = 85462056.

The previous prime is 149558659. The next prime is 149558681. The reversal of 149558661 is 166855941.

149558661 is a `hidden beast` number, since 1 + 4 + 9 + 5 + 586 + 61 = 666.

It is not a de Polignac number, because 149558661 - 2¹ = 149558659 is a prime.

It is a super-4 number, since 4×149558661⁴ (a number of 34 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149558681) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1186911 + ... + 1187036.

It is an arithmetic number, because the mean of its divisors is an integer number (20574216).

Almost surely, 2^149558661 is an apocalyptic number.

It is an amenable number.

149558661 is a deficient number, since it is larger than the sum of its proper divisors (97331931).

149558661 is a wasteful number, since it uses less digits than its factorization.

149558661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2373960 (or 2373957 counting only the distinct ones).

The product of its digits is 259200, while the sum is 45.

The square root of 149558661 is about 12229.4178520484. The cubic root of 149558661 is about 530.8076697138.

The spelling of 149558661 in words is "one hundred forty-nine million, five hundred fifty-eight thousand, six hundred sixty-one".