16620678 has 12 divisors (see below), whose sum is σ = 36011508. Its totient is φ = 5540220.

The previous prime is 16620677. The next prime is 16620689. The reversal of 16620678 is 87602661.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16620671) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 461668 + ... + 461703.

It is an arithmetic number, because the mean of its divisors is an integer number (3000959).

Almost surely, 2^16620678 is an apocalyptic number.

16620678 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

16620678 is an abundant number, since it is smaller than the sum of its proper divisors (19390830).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16620678 is a wasteful number, since it uses less digits than its factorization.

16620678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 923379 (or 923376 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 16620678 is about 4076.8465754796. The cubic root of 16620678 is about 255.2013173774.

The spelling of 16620678 in words is "sixteen million, six hundred twenty thousand, six hundred seventy-eight".