137666674 has 4 divisors (see below), whose sum is σ = 206500014. Its totient is φ = 68833336.

The previous prime is 137666651. The next prime is 137666681. The reversal of 137666674 is 476666731.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 476666731 = 4993 ⋅95467.

It can be written as a sum of positive squares in only one way, i.e., 80013025 + 57653649 = 8945^2 + 7593^2 .

It is a super-2 number, since 2×137666674² = 37904226260444552, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34416667 + ... + 34416670.

Almost surely, 2^137666674 is an apocalyptic number.

137666674 is a deficient number, since it is larger than the sum of its proper divisors (68833340).

137666674 is an equidigital number, since it uses as much as digits as its factorization.

137666674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68833339.

The product of its digits is 762048, while the sum is 46.

The square root of 137666674 is about 11733.1442503704. The cubic root of 137666674 is about 516.3485241316.

The spelling of 137666674 in words is "one hundred thirty-seven million, six hundred sixty-six thousand, six hundred seventy-four".