37666642 has 8 divisors (see below), whose sum is σ = 60846156. Its totient is φ = 17384592.

The previous prime is 37666633. The next prime is 37666649. The reversal of 37666642 is 24666673.

It can be written as a sum of positive squares in 2 ways, for example, as 31708161 + 5958481 = 5631^2 + 2441^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 37666595 and 37666604.

It is not an unprimeable number, because it can be changed into a prime (37666649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 724333 + ... + 724384.

Almost surely, 2^37666642 is an apocalyptic number.

37666642 is a deficient number, since it is larger than the sum of its proper divisors (23179514).

37666642 is a wasteful number, since it uses less digits than its factorization.

37666642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1448732.

The product of its digits is 217728, while the sum is 40.

The square root of 37666642 is about 6137.3155369428. The cubic root of 37666642 is about 335.2115453044.

The spelling of 37666642 in words is "thirty-seven million, six hundred sixty-six thousand, six hundred forty-two".