37720066 has 8 divisors (see below), whose sum is σ = 57140604. Its totient is φ = 18673200.

The previous prime is 37720061. The next prime is 37720079. The reversal of 37720066 is 66002773.

It can be written as a sum of positive squares in 2 ways, for example, as 30019441 + 7700625 = 5479^2 + 2775^2 .

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

It is not an unprimeable number, because it can be changed into a prime (37720061) 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, 93165 + ... + 93568.

Almost surely, 2^37720066 is an apocalyptic number.

37720066 is a deficient number, since it is larger than the sum of its proper divisors (19420538).

37720066 is a wasteful number, since it uses less digits than its factorization.

37720066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186836.

The product of its (nonzero) digits is 10584, while the sum is 31.

The square root of 37720066 is about 6141.6663862506. Note that the first 3 decimals coincide. The cubic root of 37720066 is about 335.3699514398.

The spelling of 37720066 in words is "thirty-seven million, seven hundred twenty thousand, sixty-six".