16706690 has 64 divisors (see below), whose sum is σ = 40400640. Its totient is φ = 4803840.

The previous prime is 16706689. The next prime is 16706693. The reversal of 16706690 is 9660761.

It is a happy number.

It is a super-2 number, since 2×16706690² = 558226981512200, which contains 22 as substring.

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

It is a nialpdrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 16706690.

It is not an unprimeable number, because it can be changed into a prime (16706693) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9176 + ... + 10844.

It is an arithmetic number, because the mean of its divisors is an integer number (631260).

Almost surely, 2^16706690 is an apocalyptic number.

16706690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16706690 is an abundant number, since it is smaller than the sum of its proper divisors (23693950).

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

16706690 is a wasteful number, since it uses less digits than its factorization.

16706690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1707.

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 16706690 is about 4087.3818025724. The cubic root of 16706690 is about 255.6407823981.

The spelling of 16706690 in words is "sixteen million, seven hundred six thousand, six hundred ninety".