66462749 has 4 divisors (see below), whose sum is σ = 66552000. Its totient is φ = 66373500.

The previous prime is 66462743. The next prime is 66462757. The reversal of 66462749 is 94726466.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 66462749 - 2¹⁶ = 66397213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66462743) 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, 43499 + ... + 45000.

It is an arithmetic number, because the mean of its divisors is an integer number (16638000).

Almost surely, 2^66462749 is an apocalyptic number.

It is an amenable number.

66462749 is a deficient number, since it is larger than the sum of its proper divisors (89251).

66462749 is an equidigital number, since it uses as much as digits as its factorization.

66462749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89250.

The product of its digits is 435456, while the sum is 44.

The square root of 66462749 is about 8152.4688898517. The cubic root of 66462749 is about 405.0662879863.

The spelling of 66462749 in words is "sixty-six million, four hundred sixty-two thousand, seven hundred forty-nine".