37666387 has 12 divisors (see below), whose sum is σ = 42961464. Its totient is φ = 32748320.

The previous prime is 37666381. The next prime is 37666393. The reversal of 37666387 is 78366673.

It is an interprime number because it is at equal distance from previous prime (37666381) and next prime (37666393).

It is not a de Polignac number, because 37666387 - 2¹¹ = 37664339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (37666381) 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, 2583 + ... + 9055.

It is an arithmetic number, because the mean of its divisors is an integer number (3580122).

Almost surely, 2^37666387 is an apocalyptic number.

37666387 is a deficient number, since it is larger than the sum of its proper divisors (5295077).

37666387 is a wasteful number, since it uses less digits than its factorization.

37666387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6530 (or 6507 counting only the distinct ones).

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

The square root of 37666387 is about 6137.2947623525. The cubic root of 37666387 is about 335.2107888514.

It can be divided in two parts, 3766 and 6387, that added together give a triangular number (10153 = T₁₄₂).

The spelling of 37666387 in words is "thirty-seven million, six hundred sixty-six thousand, three hundred eighty-seven".