66620348 has 24 divisors (see below), whose sum is σ = 123832800. Its totient is φ = 31251968.

The previous prime is 66620347. The next prime is 66620371. The reversal of 66620348 is 84302666.

It is a super-2 number, since 2×66620348² = 8876541535282208, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66620347) 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, 23048 + ... + 25776.

It is an arithmetic number, because the mean of its divisors is an integer number (5159700).

Almost surely, 2^66620348 is an apocalyptic number.

66620348 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

66620348 is a deficient number, since it is larger than the sum of its proper divisors (57212452).

66620348 is a wasteful number, since it uses less digits than its factorization.

66620348 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3109 (or 3107 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 35.

The square root of 66620348 is about 8162.1288889603. The cubic root of 66620348 is about 405.3862047861.

The spelling of 66620348 in words is "sixty-six million, six hundred twenty thousand, three hundred forty-eight".