66372425 has 24 divisors (see below), whose sum is σ = 94416576. Its totient is φ = 45339840.

The previous prime is 66372409. The next prime is 66372431. The reversal of 66372425 is 52427366.

It is not a de Polignac number, because 66372425 - 2⁴ = 66372409 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 60179 + ... + 61271.

It is an arithmetic number, because the mean of its divisors is an integer number (3934024).

Almost surely, 2^66372425 is an apocalyptic number.

It is an amenable number.

66372425 is a deficient number, since it is larger than the sum of its proper divisors (28044151).

66372425 is a wasteful number, since it uses less digits than its factorization.

66372425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1457 (or 1452 counting only the distinct ones).

The product of its digits is 60480, while the sum is 35.

The square root of 66372425 is about 8146.9273348914. The cubic root of 66372425 is about 404.8827074861.

The spelling of 66372425 in words is "sixty-six million, three hundred seventy-two thousand, four hundred twenty-five".