151665990 has 64 divisors (see below), whose sum is σ = 423083520. Its totient is φ = 34076160.

The previous prime is 151665989. The next prime is 151666063. The reversal of 151665990 is 99566151.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6270 + ... + 18510.

It is an arithmetic number, because the mean of its divisors is an integer number (6610680).

Almost surely, 2^151665990 is an apocalyptic number.

151665990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 151665990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (211541760).

151665990 is an abundant number, since it is smaller than the sum of its proper divisors (271417530).

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

151665990 is a wasteful number, since it uses less digits than its factorization.

151665990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12317.

The product of its (nonzero) digits is 72900, while the sum is 42.

The square root of 151665990 is about 12315.2746619797. The cubic root of 151665990 is about 533.2891339239.

The spelling of 151665990 in words is "one hundred fifty-one million, six hundred sixty-five thousand, nine hundred ninety".