137666229156 has 63 divisors (see below), whose sum is σ = 361261191963. Its totient is φ = 45882064440.

The previous prime is 137666229137. The next prime is 137666229157. The reversal of 137666229156 is 651922666731.

The square root of 137666229156 is 371034.

It is a perfect power (a square), and thus also a powerful number.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (137666229157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 20 ways as a sum of consecutive naturals, for example, 20032401 + ... + 20039271.

Almost surely, 2^137666229156 is an apocalyptic number.

137666229156 is the 371034-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 137666229156

137666229156 is an abundant number, since it is smaller than the sum of its proper divisors (223594962807).

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

137666229156 is an frugal number, since it uses more digits than its factorization.

137666229156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13764 (or 6876 counting only the distinct ones).

The product of its digits is 4898880, while the sum is 54.

The spelling of 137666229156 in words is "one hundred thirty-seven billion, six hundred sixty-six million, two hundred twenty-nine thousand, one hundred fifty-six".