247666902 has 32 divisors (see below), whose sum is σ = 585619200. Its totient is φ = 68321568.

The previous prime is 247666901. The next prime is 247666961. The reversal of 247666902 is 209666742.

It is a happy number.

247666902 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×247666902² = 122677788692555208, which contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (247666901) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 100452 + ... + 102887.

It is an arithmetic number, because the mean of its divisors is an integer number (18300600).

Almost surely, 2^247666902 is an apocalyptic number.

247666902 is an abundant number, since it is smaller than the sum of its proper divisors (337952298).

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

247666902 is a wasteful number, since it uses less digits than its factorization.

247666902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203380.

The product of its (nonzero) digits is 217728, while the sum is 42.

The square root of 247666902 is about 15737.4363223493. The cubic root of 247666902 is about 627.9947174559.

It can be divided in two parts, 2476 and 66902, that added together give a triangular number (69378 = T₃₇₂).

The spelling of 247666902 in words is "two hundred forty-seven million, six hundred sixty-six thousand, nine hundred two".