66738037 has 12 divisors (see below), whose sum is σ = 69477156. Its totient is φ = 64066560.

The previous prime is 66738011. The next prime is 66738041. The reversal of 66738037 is 73083766.

It can be written as a sum of positive squares in 6 ways, for example, as 576081 + 66161956 = 759^2 + 8134^2 .

It is a de Polignac number, because none of the positive numbers 2^k-66738037 is a prime.

It is a super-2 number, since 2×66738037² = 8907931165226738, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66738137) 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, 385683 + ... + 385855.

It is an arithmetic number, because the mean of its divisors is an integer number (5789763).

Almost surely, 2^66738037 is an apocalyptic number.

It is an amenable number.

66738037 is a deficient number, since it is larger than the sum of its proper divisors (2739119).

66738037 is an equidigital number, since it uses as much as digits as its factorization.

66738037 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408 (or 311 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 40.

The square root of 66738037 is about 8169.3351626678. The cubic root of 66738037 is about 405.6247776951.

The spelling of 66738037 in words is "sixty-six million, seven hundred thirty-eight thousand, thirty-seven".