66373456 has 10 divisors (see below), whose sum is σ = 128598602. Its totient is φ = 33186720.

The previous prime is 66373453. The next prime is 66373459. The reversal of 66373456 is 65437366.

It is an interprime number because it is at equal distance from previous prime (66373453) and next prime (66373459).

It can be written as a sum of positive squares in only one way, i.e., 64641600 + 1731856 = 8040^2 + 1316^2 .

It is a super-2 number, since 2×66373456² = 8810871322767872, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66373453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2074155 + ... + 2074186.

Almost surely, 2^66373456 is an apocalyptic number.

It is an amenable number.

66373456 is a deficient number, since it is larger than the sum of its proper divisors (62225146).

66373456 is a wasteful number, since it uses less digits than its factorization.

66373456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4148349 (or 4148343 counting only the distinct ones).

The product of its digits is 272160, while the sum is 40.

The square root of 66373456 is about 8146.9906100351. The cubic root of 66373456 is about 404.8848038984.

The spelling of 66373456 in words is "sixty-six million, three hundred seventy-three thousand, four hundred fifty-six".