66937897 has 8 divisors (see below), whose sum is σ = 74412800. Its totient is φ = 59795280.

The previous prime is 66937883. The next prime is 66937907. The reversal of 66937897 is 79873966.

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

It is a de Polignac number, because none of the positive numbers 2^k-66937897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66937807) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82647 + ... + 83452.

It is an arithmetic number, because the mean of its divisors is an integer number (9301600).

Almost surely, 2^66937897 is an apocalyptic number.

It is an amenable number.

66937897 is a deficient number, since it is larger than the sum of its proper divisors (7474903).

66937897 is a wasteful number, since it uses less digits than its factorization.

66937897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166143.

The product of its digits is 3429216, while the sum is 55.

The square root of 66937897 is about 8181.5583478944. The cubic root of 66937897 is about 406.0292815397.

It can be divided in two parts, 6693 and 7897, that multiplied together give a triangular number (52854621 = T₁₀₂₈₁).

The spelling of 66937897 in words is "sixty-six million, nine hundred thirty-seven thousand, eight hundred ninety-seven".