266945490 has 64 divisors (see below), whose sum is σ = 813553920. Its totient is φ = 61015680.

The previous prime is 266945479. The next prime is 266945507. The reversal of 266945490 is 94549662.

It is a Harshad number since it is a multiple of its sum of digits (45).

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, 68731 + ... + 72510.

It is an arithmetic number, because the mean of its divisors is an integer number (12711780).

Almost surely, 2^266945490 is an apocalyptic number.

266945490 is an abundant number, since it is smaller than the sum of its proper divisors (546608430).

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

266945490 is a wasteful number, since it uses less digits than its factorization.

266945490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141264 (or 141258 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 45.

The square root of 266945490 is about 16338.4665743147. The cubic root of 266945490 is about 643.8838457359.

The spelling of 266945490 in words is "two hundred sixty-six million, nine hundred forty-five thousand, four hundred ninety".