66924963 has 24 divisors (see below), whose sum is σ = 115285248. Its totient is φ = 36579312.

The previous prime is 66924961. The next prime is 66924967. The reversal of 66924963 is 36942966.

It is not a de Polignac number, because 66924963 - 2¹ = 66924961 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66924961) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21645 + ... + 24542.

It is an arithmetic number, because the mean of its divisors is an integer number (4803552).

Almost surely, 2^66924963 is an apocalyptic number.

66924963 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

66924963 is a deficient number, since it is larger than the sum of its proper divisors (48360285).

66924963 is a wasteful number, since it uses less digits than its factorization.

66924963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46223 (or 46220 counting only the distinct ones).

The product of its digits is 419904, while the sum is 45.

The square root of 66924963 is about 8180.7678734945. The cubic root of 66924963 is about 406.0031283378.

The spelling of 66924963 in words is "sixty-six million, nine hundred twenty-four thousand, nine hundred sixty-three".